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Eastman Kodak Co

Eastman Ko
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847

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
EP0926879A2 Recording audio and electronic images Expired / Lapsed 1998-12-05 — 12 Details
DE19817756A1 Method of producing image on lithographic element using las… Expired / Lapsed 1998-04-21 — 0 Details
EP0875395A1 Zirconia-alumina composite ceramic lithographic printing me… Expired / Lapsed 1998-04-20 — 10 Details
DE19814877A1 Lithographic rotary printing cylinder or sleeve Expired / Lapsed 1998-04-02 — 0 Details
EP0769372A1 Method of lithographic printing Expired / Lapsed 1996-10-15 — 16 Details
EP0766449A2 Copy protection system Expired / Lapsed 1996-09-11 — 7 Details
EP0675648A2 Electronic imaging system using a removable software-enhanc… Expired / Lapsed 1995-03-20 — 10 Details
EP0654760A2 Thermal printer supply having non-volatile memory Expired / Lapsed 1994-11-22 — 6 Details
EP0599097A2 Automatic routing to selected destinations of storage phosp… Expired / Lapsed 1993-11-02 — 4 Details
EP0569758A2 Method and apparatus for creating and storing three-dimensi… Expired / Lapsed 1993-04-23 — 28 Details
EP0552802A2 Chemically fixed micelles comprising copolymer Expired / Lapsed 1993-01-22 — 12 Details
EP0532883A1 Airbrush modeling routine for an electric image reproductio… Expired / Lapsed 1992-08-05 — 11 Details
EP0467459A2 Near infrared diagnostic method and instrument Expired / Lapsed 1991-07-11 — 19 Details
WO1990007184A1 Method and apparatus for handling high speed data Expired / Lapsed 1989-12-07 — 0 Details
EP0360452A2 Latex particles in analytical reagents, elements and methods Expired / Lapsed 1989-09-05 — 15 Details
EP0356351A1 Electronic camera with proofing feature Expired / Lapsed 1989-08-10 — 18 Details
EP0291170A1 Rearwardly acting surgical catheter Expired / Lapsed 1988-04-13 — 8 Details
WO1985004412A1 Novel polyesteramides and containers having improved gas ba… Expired / Lapsed 1985-03-15 — 0 Details
EP0140337A2 Multizone element and method for analysis of whole blood Expired / Lapsed 1984-10-25 — 11 Details
WO1984000282A1 Rumen-stable pellets Expired / Lapsed 1983-07-06 — 0 Details
EP0034049A1 Test device for analysis of a plurality of analytes Expired / Lapsed 1981-02-05 — 14 Details
EP0013156A1 Particulate structure and element for analysis or transport… Expired / Lapsed 1979-12-21 — 25 Details
DE2925812A1 INK PRINTING DEVICE FOR MULTICOLOR PRINTING OF A RECORD CAR… Expired / Lapsed 1979-06-26 — 0 Details
DE2535772A1 METHOD OF CONTROLLING EXPOSURE IN A PHOTOGRAPHIC PRINTER AN… Expired / Lapsed 1975-08-11 — 0 Details
FR2280115A1 Electrophotographic copying by developing electrostatic ima… Expired / Lapsed 1975-07-22 — 0 Details
DE2512586A1 MULTI-LAYER ANALYTICAL ELEMENT FOR THE QUANTITATIVE DETERMI… Expired / Lapsed 1975-03-21 — 0 Details
DE2450638A1 DROP BEAM RECORDER HEAD Expired / Lapsed 1974-10-24 — 0 Details
DE2436536A1 DEVICE FOR ACOUSTOOPTIC MODULATING OF LIGHT Expired / Lapsed 1974-07-29 — 0 Details
BE801742A PRODUCT FOR THE ANALYSIS OF FLUIDS ESPECIALLY BODY Expired / Lapsed 1973-06-29 — 0 Details
DE2332760A1 MULTI-LAYER ANALYTICAL ELEMENT FOR QUANTITATIVE SPECTROPHOT… Expired / Lapsed 1973-06-27 — 0 Details
DE2332760B2 MATERIAL FOR THE QUANTITATIVE SPECTROPHOTOMETRIC ANALYSIS O… Expired / Lapsed 1973-06-27 — 0 Details
DE2217342A1 Automatic distance measuring device Expired / Lapsed 1972-04-11 — 0 Details
DE2142176A1 Device for imaging originals on a light-sensitive material Expired / Lapsed 1971-08-23 — 0 Details
DE2127381B2 DE2127381B2 - - Google Patents Expired / Lapsed 1971-06-02 — 0 Details
DE1928553A1 Process for gluing and coating objects Expired / Lapsed 1969-06-04 — 0 Details
DE1815220A1 Process for reducing the content of unbound maleic and / or… Expired / Lapsed 1968-12-17 — 0 Details
GB1196771A Range Finders. Expired / Lapsed 1967-05-25 — 0 Details
GB965085A Block copolycarbonates Expired / Lapsed 1960-07-18 — 0 Details
GB708016A Improvements in or relating to apparatus for translating el… Expired / Lapsed 1951-08-23 — 0 Details
GB701790A Improvements in processes for coating with metals by therma… Expired / Lapsed 1950-09-06 — 0 Details
US7301497B2 Stereo display for position sensing systems Expired / Lapsed 2005-04-05 2007-11-27 9 Details
US6834961B1 Autostereoscopic optical apparatus Expired / Lapsed 2003-09-12 2004-12-28 96 Details
US6768585B2 Monocentric autostereoscopic optical apparatus using a scan… Expired / Lapsed 2002-05-02 2004-07-27 89 Details
US6702442B2 Monocentric autostereoscopic optical apparatus using resona… Expired / Lapsed 2002-03-08 2004-03-09 178 Details
US6690843B1 System and method of constructing a photo album Expired / Lapsed 1998-12-29 2004-02-10 25 Details
US6556698B1 Method and system for associating exposed radiographic film… Expired / Lapsed 1999-04-20 2003-04-29 25 Details
US6550918B1 Monocentric autostereoscopic viewing apparatus using resona… Expired / Lapsed 2002-03-19 2003-04-22 49 Details
US6508549B1 Ink jet ink set Expired / Lapsed 2001-05-03 2003-01-21 17 Details
US6434579B1 System and method of constructing a photo album Expired / Lapsed 1998-08-19 2002-08-13 23 Details
US6362900B1 System and method of constructing a photo album Expired / Lapsed 1998-12-30 2002-03-26 13 Details
US6307663B1 Spatial light modulator with conformal grating device Expired / Lapsed 2000-01-26 2001-10-23 33 Details
US6288719B1 System and method of constructing a photo album Expired / Lapsed 1998-10-26 2001-09-11 23 Details
US6232954B1 Arrangement for high-accuracy colorimetric characterization… Expired / Lapsed 1997-05-08 2001-05-15 45 Details
US6191406B1 Data reader and reader system having visible centerless tar… Expired / Lapsed 1998-07-24 2001-02-20 36 Details
US5978016A Electronic camera with internal fixed album memory Expired / Lapsed 1997-02-20 1999-11-02 9 Details
US5530502A Camera autowind gear mechanism Expired / Lapsed 1995-03-13 1996-06-25 35 Details
US5420979A Method and apparatus for using composite transforms to form… Expired / Lapsed 1993-07-01 1995-05-30 36 Details
US5363318A Method and apparatus for adaptive color characterization an… Expired / Lapsed 1992-03-23 1994-11-08 29 Details
US5313611A Method and apparatus for maintaining a lookup table for sto… Expired / Lapsed 1992-03-23 1994-05-17 27 Details
US5300974A System and apparatus for accomodating user preferences in r… Expired / Lapsed 1993-07-08 1994-04-05 10 Details
US5301288A Virtual memory management and allocation arrangement for di… Expired / Lapsed 1993-04-27 1994-04-05 48 Details
US5261080A Matchmaker for assisting and executing the providing and co… Expired / Lapsed 1992-08-28 1993-11-09 9 Details
US5252441A Transparent magnetic recording layers and photographic elem… Expired / Lapsed 1990-11-06 1993-10-12 27 Details
US5135405A Connectors with ground structure Expired / Lapsed 1991-09-27 1992-08-04 10 Details
US5122719A Method and apparatus for reducing recurrent fluctuations in… Expired / Lapsed 1991-02-27 1992-06-16 19 Details
US5053096A Apparatus and method for splicing webs of indeterminate len… Expired / Lapsed 1990-01-26 1991-10-01 14 Details
US5034990A Edge enhancement error diffusion thresholding for document … Expired / Lapsed 1990-05-08 1991-07-23 8 Details
USD316875S Electro-optical display for cameras or the like Expired / Lapsed 1988-01-11 1991-05-14 1 Details
US4987496A System for scanning halftoned images Expired / Lapsed 1989-09-18 1991-01-22 8 Details
US4965007A Encapsulated superparamagnetic particles Expired / Lapsed 1988-05-10 1990-10-23 34 Details
US4904577A Optical recording element and alloy for use therein Expired / Lapsed 1988-11-21 1990-02-27 7 Details
US4858050A Structurally rigid disk cartridge adaptable to eliminating … Expired / Lapsed 1987-06-09 1989-08-15 5 Details
US4847175A Electrophotographic element having low surface adhesion Expired / Lapsed 1987-12-02 1989-07-11 15 Details
US4846192A Rearwardly acting surgical catheter Expired / Lapsed 1987-04-17 1989-07-11 2 Details
US4824939A Process for leaching particulate solid materials Expired / Lapsed 1986-10-09 1989-04-25 35 Details
US4787074A Automated library for data storage disks Expired / Lapsed 1987-02-27 1988-11-22 11 Details
US4784928A Reusable electrophotographic element Expired / Lapsed 1986-09-02 1988-11-15 8 Details
US4777510A Copying apparatus and method with editing and production co… Expired / Lapsed 1987-12-09 1988-10-11 57 Details
US4764670A Color filter arrays Expired / Lapsed 1987-09-01 1988-08-16 30 Details
US4743758A Light collector for photo-stimulable phosphor imaging appar… Expired / Lapsed 1986-10-14 1988-05-10 11 Details
US4737433A Electrostatographic method of making images Expired / Lapsed 1986-11-03 1988-04-12 7 Details
US4733115A Electric motor Expired / Lapsed 1986-12-16 1988-03-22 9 Details
USD293097S Battery pack Expired / Lapsed 1985-06-17 1987-12-08 1 Details
US4675755A Video disk apparatus providing organized picture playback Expired / Lapsed 1984-08-24 1987-06-23 24 Details
US4588896A Bistable circuits having a monolithic device formed with li… Expired / Lapsed 1983-11-18 1986-05-13 4 Details
US4576693A Nucleic acid sequencing electrophoresis apparatus and metho… Expired / Lapsed 1985-01-14 1986-03-18 21 Details
US4557998A Colorless ligand-releasing monomers and polymers and their … Expired / Lapsed 1985-01-02 1985-12-10 11 Details
US4553027A Apparatus for reading encoded information on a carrier subj… Expired / Lapsed 1984-10-03 1985-11-12 7 Details
US4553206A Image storage and retrieval Expired / Lapsed 1983-10-03 1985-11-12 31 Details
US4533925A Ink jet printer with non-uniform rectangular pattern of pri… Expired / Lapsed 1984-06-22 1985-08-06 13 Details
US4527891A Rangefinder device with serial readout linear image sensor … Expired / Lapsed 1982-08-18 1985-07-09 10 Details
US4513071A Erasable information recording process using co-crystalline… Expired / Lapsed 1983-11-21 1985-04-23 13 Details
US4499358A Driving circuit for radio frequency dryer Expired / Lapsed 1984-03-27 1985-02-12 11 Details
US4494841A Acoustic transducers for acoustic position sensing apparatus Expired / Lapsed 1983-09-12 1985-01-22 35 Details
US4490036A Image sensor and rangefinder device having background subtr… Expired / Lapsed 1982-08-18 1984-12-25 7 Details
US4490037A Image sensor and rangefinder device having background subtr… Expired / Lapsed 1982-08-18 1984-12-25 9 Details
US4482924A Video player, film medium, and photographic printer for aut… Expired / Lapsed 1982-09-29 1984-11-13 9 Details
US4451137A Adjusting copier copy contrast and density during productio… Expired / Lapsed 1982-05-27 1984-05-29 14 Details
US4442454A Image processing method using a block overlap transformatio… Expired / Lapsed 1982-11-15 1984-04-10 12 Details
US4413895A Electromagnetic actuator having a compliant armature Expired / Lapsed 1982-05-17 1983-11-08 28 Details
US4411973A Elements containing ordered wall arrays and processes for t… Expired / Lapsed 1981-08-17 1983-10-25 82 Details
US4410251A Integrated electromechanical camera control mechanism Expired / Lapsed 1982-03-22 1983-10-18 26 Details
US4371890A Tapering of oxidized polysilicon electrodes Expired / Lapsed 1980-10-29 1983-02-01 10 Details
USD266514S Memory cartridge for electronic printer control Expired / Lapsed 1980-07-14 1982-10-12 1 Details
US4350435A Copy contrast and density control Expired / Lapsed 1980-04-04 1982-09-21 14 Details
US4340286A Photographic film unit Expired / Lapsed 1981-02-23 1982-07-20 14 Details
US4336545A Optical disc structure, method and apparatus physically opt… Expired / Lapsed 1980-12-18 1982-06-22 54 Details
US4322752A Fast frame rate sensor readout Expired / Lapsed 1980-01-16 1982-03-30 24 Details
US4317892A Barrier layer between reactants in photographic products co… Expired / Lapsed 1980-08-04 1982-03-02 16 Details
US4315978A Solid-state color imaging device having a color filter arra… Expired / Lapsed 1980-03-06 1982-02-16 13 Details
US4294536A Automatic control of copier copy contrast and density for p… Expired / Lapsed 1980-05-30 1981-10-13 21 Details
US4279945A Process of preparing magnetic recording elements containing… Expired / Lapsed 1978-02-27 1981-07-21 11 Details
US4258370A Jet drop printer Expired / Lapsed 1979-05-04 1981-03-24 10 Details
US4251154A Electrophotographic color copier Expired / Lapsed 1979-04-09 1981-02-17 9 Details
US4238805A Ink jet printer startup and shutdown procedure Expired / Lapsed 1979-09-12 1980-12-09 16 Details
US4229950A Coupling for end gudgeon and internally heated roller Expired / Lapsed 1979-03-02 1980-10-28 14 Details
US4191465A Apparatus for producing simplex of duplex copies Expired / Lapsed 1978-07-03 1980-03-04 20 Details
US4179215A Recirculating document feeder Expired / Lapsed 1978-07-24 1979-12-18 12 Details
US4176008A Method, composition and element for the detection of nitrog… Expired / Lapsed 1978-02-24 1979-11-27 29 Details
US4170662A Plasma plating Expired / Lapsed 1978-01-23 1979-10-09 14 Details
US4163823A Magnetic recording elements and process of preparation Expired / Lapsed 1977-03-07 1979-08-07 26 Details
US4162848A Apparatus for selectively copying from two different docume… Expired / Lapsed 1978-07-12 1979-07-31 13 Details
US4154523A Exposure determination apparatus for a photographic printer Expired / Lapsed 1977-05-31 1979-05-15 14 Details
US4153668A Multi-zone analytical element and method using same Expired / Lapsed 1978-01-03 1979-05-08 18 Details
US4152152A Additives for contrast control in organic photoconductor co… Expired / Lapsed 1977-02-08 1979-05-01 27 Details
US4142891A Photographic products and processes employing nondiffusible… Expired / Lapsed 1977-08-05 1979-03-06 74 Details
US4136945A Electrophotographic apparatus having compensation for chang… Expired / Lapsed 1977-10-28 1979-01-30 10 Details
US4123760A Apparatus and method for jet deflection and recording Expired / Lapsed 1977-02-28 1978-10-31 35 Details
US4119381A Incubator and radiometric scanner Expired / Lapsed 1976-12-17 1978-10-10 8 Details
USD249511S Keyboard for electronic apparatus Expired / Lapsed 1977-05-31 1978-09-19 1 Details
US4106061A Density control for ink jet copier Expired / Lapsed 1977-03-03 1978-08-08 14 Details
US4098631A Method for manufacturing a compliant roller for use in an e… Expired / Lapsed 1976-08-18 1978-07-04 12 Details
USD247969S Microfilm reader or the like Expired / Lapsed 1977-03-24 1978-05-23 1 Details
US4088411A Length measurement apparatus for continuously advancing art… Expired / Lapsed 1976-04-29 1978-05-09 2 Details
US4085409A Method and apparatus for ink jet printing Expired / Lapsed 1976-06-01 1978-04-18 15 Details
US4084259A Apparatus for dot matrix recording Expired / Lapsed 1974-10-11 1978-04-11 7 Details
US4081277A Method for making a solid-state color imaging device having… Expired / Lapsed 1976-10-08 1978-03-28 20 Details
US4069017A Colorimetric assay for bilirubin Expired / Lapsed 1977-01-14 1978-01-17 26 Details
US4062686A Sensitizers for photocrosslinkable polymers Expired / Lapsed 1976-04-21 1977-12-13 35 Details
US4053381A Device for determining ionic activity of components of liqu… Expired / Lapsed 1976-05-19 1977-10-11 36 Details
US4052320A Telescoping serum separator and dispenser Expired / Lapsed 1976-07-08 1977-10-04 25 Details
US4050898A Integral analytical element Expired / Lapsed 1976-04-26 1977-09-27 31 Details
US4047992A Turn-on method and apparatus for ultrasonic operations Expired / Lapsed 1976-03-02 1977-09-13 14 Details
US4042335A Integral element for analysis of liquids Expired / Lapsed 1976-06-25 1977-08-16 28 Details
US4040886A Apparatus for treating a workpiece Expired / Lapsed 1976-04-30 1977-08-09 9 Details
US4035356A Copolyester prepared from an acyloxybenzoic acid and polyet… Expired / Lapsed 1976-05-07 1977-07-12 7 Details
US4032471A Process for preparing yttrium oxide and rare earth metal ox… Expired / Lapsed 1976-02-11 1977-06-28 18 Details
US4026668A Control apparatus for silver halide emulsion making Expired / Lapsed 1975-11-24 1977-05-31 3 Details
US4023068A Electronic flash apparatus for conserving flash battery life Expired / Lapsed 1976-03-15 1977-05-10 16 Details
US4022728A Hot melt pressure sensitive adhesives Expired / Lapsed 1975-06-10 1977-05-10 10 Details
US4022855A Method for making a plastic optical element having a gradie… Expired / Lapsed 1975-03-17 1977-05-10 18 Details
US4010477A Head assembly for a jet drop recorder Expired / Lapsed 1976-01-29 1977-03-01 7 Details
US4000493A Acoustooptic scanner apparatus and method Expired / Lapsed 1975-11-03 1976-12-28 35 Details
US3997342A Photoconductive element exhibiting persistent conductivity Expired / Lapsed 1975-10-08 1976-12-14 21 Details
US3983005A Integral element for the analysis of cholesterol Expired / Lapsed 1975-04-07 1976-09-28 81 Details
US3971065A Color imaging array Expired / Lapsed 1975-03-05 1976-07-20 14 Details
US3958991A Supersensitizing dye combination for electrophotographic co… Expired / Lapsed 1974-08-07 1976-05-25 14 Details
US3938992A Electrographic developing composition and process using a f… Expired / Lapsed 1974-08-19 1976-02-17 27 Details
US3922380A Auto bias control method Expired / Lapsed 1974-12-05 1975-11-25 2 Details
US3913719A Alternate memory control for dot matrix late news device Expired / Lapsed 1975-02-24 1975-10-21 9 Details
US3914047A Synchronizing control apparatus for electrophotographic app… Expired / Lapsed 1974-06-20 1975-10-21 19 Details
US3904392A Method of and apparatus for debubbling liquids Expired / Lapsed 1973-03-16 1975-09-09 11 Details
US3900328A Method and apparatus for molding glass lenses Expired / Lapsed 1973-03-12 1975-08-19 47 Details
US3887939A Scanning apparatus and method using sharp and unsharp spots Expired / Lapsed 1973-04-23 1975-06-03 12 Details
US3880657A Conducting layer for organic photoconductive element Expired / Lapsed 1974-07-08 1975-04-29 17 Details
US3879295A Vacutainer with positive separation barrier Expired / Lapsed 1973-08-17 1975-04-22 11 Details
US3877413A Auto bias control apparatus Expired / Lapsed 1973-06-18 1975-04-15 7 Details
US3876106A Toner concentration monitoring apparatus utilizing programm… Expired / Lapsed 1973-10-01 1975-04-08 7 Details
US3869197A Light-deflecting system for effecting bragg diffraction ove… Expired / Lapsed 1973-07-30 1975-03-04 6 Details
US3859386A Emulsifiable polyolefin compositions compositions prepared … Expired / Lapsed 1973-07-20 1975-01-07 12 Details
US3859385A Emulsifiable polyethylene compositions prepared from therma… Expired / Lapsed 1973-07-20 1975-01-07 9 Details
US3859092A Photographic systems based on photosensitive copper (i) com… Expired / Lapsed 1973-05-30 1975-01-07 38 Details
US3856889A Blends containing polyethylene and an unsaturated polycarbo… Expired / Lapsed 1972-09-11 1974-12-24 8 Details
US3844755A Method and apparatus for transfer molding glass lenses Expired / Lapsed 1972-11-16 1974-10-29 32 Details
USRE28219E Image construction system using multiple arrays of drop gen… Expired / Lapsed 1972-10-24 1974-10-29 0 Details
US3835332A Inspection apparatus for detecting defects in a web Expired / Lapsed 1973-06-04 1974-09-10 22 Details
US3833384A Photopolymerizable compositions and elements and uses there… Expired / Lapsed 1973-04-06 1974-09-03 16 Details
US3822009A Item transporting system Expired / Lapsed 1973-02-01 1974-07-02 11 Details
US3820738A Magazine for a reel Expired / Lapsed 1973-05-18 1974-06-28 13 Details
US3814600A Electrophotographic element Expired / Lapsed 1972-02-10 1974-06-04 0 Details
US3797022A Apparatus and method for reproduction of character matrices… Expired / Lapsed 1972-07-25 1974-03-12 2 Details
US3793805A Method and apparatus for removing air from a liquid Expired / Lapsed 1971-12-13 1974-02-26 9 Details
US3779644A Document holder exchange apparatus Expired / Lapsed 1972-10-26 1973-12-18 7 Details
US3772011A Print-out elements and methods using photoconductors and po… Expired / Lapsed 1971-11-04 1973-11-13 20 Details
US3767780A Preparation of manganese oxides Expired / Lapsed 1972-02-03 1973-10-23 0 Details
US3765884A 1-substituted-2-indoline hydrazone photoconductors Expired / Lapsed 1971-07-06 1973-10-16 5 Details
US3761953A Ink supply system for a jet ink printer Expired / Lapsed 1972-10-24 1973-09-25 36 Details
US3761941A Phase control for a drop generating and charging system Expired / Lapsed 1972-10-13 1973-09-25 24 Details
US3759614A Dual photocell range finder apparatus Expired / Lapsed 1971-02-10 1973-09-18 10 Details
US3745160A Novel borinium cyanine dyes Expired / Lapsed 1970-10-30 1973-07-10 0 Details
US3742827A Shutter control apparatus for photographic cameras Expired / Lapsed 1971-03-15 1973-07-03 13 Details
US3740218A Photoconductive elements containing complexes of lewis acid… Expired / Lapsed 1971-06-01 1973-06-19 0 Details
US3736015A Winding mechanism for a camera Expired / Lapsed 1971-04-30 1973-05-29 11 Details
US3733373A Poly-1-butene resins Expired / Lapsed 1971-04-01 1973-05-15 0 Details
US3732005A Integrated circuit sequencer Expired / Lapsed 1972-01-12 1973-05-08 5 Details
US3732003A Electrostatographic compensation apparatus Expired / Lapsed 1971-12-28 1973-05-08 12 Details
US3726685A Photosensitive composition comprising light-sensitive copol… Expired / Lapsed 1971-11-17 1973-04-10 0 Details
US3724469A Tobacco smoke filter Expired / Lapsed 1971-09-23 1973-04-03 4 Details
US3720148A Apparatus having an automatic range finder mechanism Expired / Lapsed 1970-05-18 1973-03-13 5 Details
US3718594A Method of preparing magnetically responsive carrier particl… Expired / Lapsed 1970-11-30 1973-02-27 5 Details
US3709690A Novel polymers and photographic elements containing same Expired / Lapsed 1970-12-21 1973-01-09 2 Details
US3703585A D.c. sputtering of particulate polymeric compounds onto a s… Expired / Lapsed 1970-06-24 1972-11-21 0 Details
US3700320A Automatic searching system Expired / Lapsed 1970-09-03 1972-10-24 12 Details
US3689693A Multiple head ink drop graphic generator Expired / Lapsed 1970-11-17 1972-09-05 9 Details
US3671256A Polymeric hardeners containing aziridinyl units on the side… Expired / Lapsed 1970-04-16 1972-06-20 0 Details
US3653762A Automatic rangefinder Expired / Lapsed 1970-09-28 1972-04-04 16 Details
US3651324A Electromagnetic automatic aperture control utilizing a velo… Expired / Lapsed 1970-08-24 1972-03-21 13 Details
US3647431A Substituted bis(p-diakylaminophenyl) methane photoconductors Expired / Lapsed 1969-10-01 1972-03-07 9 Details
US3646353A Flying spot scanner blanking Expired / Lapsed 1970-10-19 1972-02-29 17 Details
US3645941A Method of preparing 2-p-dioxanone polymers Expired / Lapsed 1970-04-01 1972-02-29 0 Details
US3637418A Polyolefin articles having effective oxygen barriers Expired / Lapsed 1969-10-13 1972-01-25 12 Details
US3637394A Photographic elements containing synthetic polymeric vehicl… Expired / Lapsed 1968-04-22 1972-01-25 6 Details
US3636150A Process for preparing cellulose ester reverse osmosis membr… Expired / Lapsed 1969-11-28 1972-01-18 0 Details
US3632512A Method of preparing magnetically responsive carrier particl… Expired / Lapsed 1969-02-17 1972-01-04 0 Details
US3623811A Electrooptical rangefinder means Expired / Lapsed 1970-10-30 1971-11-30 12 Details
US3604846A Method and system for reconstruction of half-tone images Expired / Lapsed 1969-03-03 1971-09-14 16 Details
US3592671A Stabilization of cellulose ester dopes Expired / Lapsed 1969-12-22 1971-07-13 0 Details
US3589880A Plurality optical element pressing process Expired / Lapsed 1970-03-24 1971-06-29 0 Details
US3588906A Image construction system with clocked information input Expired / Lapsed 1968-10-18 1971-06-28 0 Details
US3574615A Mechanism for electrically contacting a thin layer and use … Expired / Lapsed 1968-04-04 1971-04-13 0 Details
US3574469A Fault-detecting surface scanner using a laser light source Expired / Lapsed 1968-01-23 1971-04-13 2 Details
US3567453A Light sensitive compositions for photoresists and lithograp… Expired / Lapsed 1967-12-26 1971-03-02 0 Details
US3561344A Electronic replenishment apparatus for photographic process… Expired / Lapsed 1968-05-23 1971-02-09 5 Details
US3554745A Electrophotographic composition and element Expired / Lapsed 1968-03-29 1971-01-12 0 Details
US3553429A Temperature control circuit Expired / Lapsed 1968-11-18 1971-01-05 20 Details
US3552846A Slide stack handling system for projectors Expired / Lapsed 1968-05-01 1971-01-05 0 Details
US3547891A Heat formable polyester film Expired / Lapsed 1969-04-02 1970-12-15 0 Details
US3547693A Magnetic tape Expired / Lapsed 1968-09-20 1970-12-15 0 Details
US3547548A Photoelectronic switching amplifier Expired / Lapsed 1968-07-30 1970-12-15 0 Details
US3539252A Automatic exposure control Expired / Lapsed 1968-01-11 1970-11-10 0 Details
US3536986A Low level costant current source Expired / Lapsed 1968-12-18 1970-10-27 0 Details
US3522335A Methods for producing reverse osmosis membrane and the comp… Expired / Lapsed 1968-02-29 1970-07-28 0 Details
US3522328A Modified polyester compositions containing polyamides prepa… Expired / Lapsed 1967-10-11 1970-07-28 0 Details
US3517990A Fade-in,fade-out control Expired / Lapsed 1969-10-02 1970-06-30 0 Details
US3516957A Thermoplastic polyester composition containing organic este… Expired / Lapsed 1968-04-29 1970-06-23 0 Details
US3516720A Thin film coating for sunglasses Expired / Lapsed 1968-03-04 1970-06-23 0 Details
US3505293A Polyester adhesive Expired / Lapsed 1966-04-04 1970-04-07 0 Details
US3492155A Reinforced flexible chromatographic elements Expired / Lapsed 1967-09-11 1970-01-27 0 Details
US3489146A Artificial kidney system Expired / Lapsed 1967-01-12 1970-01-13 0 Details
US3484403A Preparation of polyamide-carboxylated polyolefin melt blends Expired / Lapsed 1966-03-14 1969-12-16 0 Details
US3482574A Artificial kidney system provided with a lever actuated shu… Expired / Lapsed 1967-01-12 1969-12-09 0 Details
US3482573A Artificial kidney system provided with automatic coupling m… Expired / Lapsed 1967-01-12 1969-12-09 0 Details
US3481910A Reaction products of unsaturated dicarboxylic acids,anhydri… Expired / Lapsed 1965-10-04 1969-12-02 0 Details
US3475176A Azide sensitized photosensitive prepolymer compositions Expired / Lapsed 1966-09-06 1969-10-28 0 Details
US3475356A Solvent resistant cross-linked polymers derived from cellul… Expired / Lapsed 1966-01-27 1969-10-28 0 Details
US3473456A Photographic camera with metered film advance and double ex… Expired / Lapsed 1967-01-18 1969-10-21 0 Details
US3471227A Device for controlling film pull-down mechanism to provide … Expired / Lapsed 1967-03-15 1969-10-07 0 Details
US3464773A Photometer apparatus employing matched circuits Expired / Lapsed 1965-10-22 1969-09-02 0 Details
US3454694A Method of forming plastic book backs Expired / Lapsed 1967-08-16 1969-07-08 0 Details
US3453436A Thermally coupled image amplifier Expired / Lapsed 1965-03-25 1969-07-01 0 Details
US3449903A Randomly entangled textile product Expired / Lapsed 1968-01-05 1969-06-17 0 Details
US3437486A Monobasically sulfated vinyl copolymers as silver halide st… Expired / Lapsed 1966-04-04 1969-04-08 2 Details
US3435744A Automatic focusing system Expired / Lapsed 1966-05-31 1969-04-01 0 Details
US3433855A Propylene-diolefinic hydrocarbon block copolymers and proce… Expired / Lapsed 1966-11-15 1969-03-18 2 Details
US3427941A Automatic exposure control Expired / Lapsed 1966-07-28 1969-02-18 0 Details
US3418152A Method of making a chromatographic element containing a res… Expired / Lapsed 1966-08-01 1968-12-24 0 Details
US3416907A Method of forming zinc oxide infrared transmitting optical … Expired / Lapsed 1965-06-30 1968-12-17 0 Details
US3407405A Recorder for producing composite diffraction grating pattern Expired / Lapsed 1966-05-18 1968-10-22 0 Details
US3405083A Heat-sealable films comprising a polyolefin coated with an … Expired / Lapsed 1964-03-05 1968-10-08 2 Details
US3402007A Film feeding mechanism Expired / Lapsed 1965-07-08 1968-09-17 2 Details
US3402111A Emulsion developers for photoconductography Expired / Lapsed 1965-01-22 1968-09-17 0 Details
US3392151A Modified polymers useful in photographic elements Expired / Lapsed 1966-12-27 1968-07-09 0 Details
US3390134A Prepolymer crystallization and solid phase polymerization Expired / Lapsed 1967-01-16 1968-06-25 0 Details
US3389444A Apparatus for entangling multifilament yarns Expired / Lapsed 1965-11-15 1968-06-25 0 Details
US3379665A Polymeric compositions of high vinylidene chloride content … Expired / Lapsed 1966-06-13 1968-04-23 0 Details
US3379528A Activator solution rejuvenation Expired / Lapsed 1964-07-17 1968-04-23 1 Details
US3376134A Photoconductive compositions comprising zinc oxide and meth… Expired / Lapsed 1965-03-16 1968-04-02 2 Details
US3367993A Polycarbonate elastomers from 5, 6, 7, 8-tetrahydro-1, 4-na… Expired / Lapsed 1965-08-09 1968-02-06 0 Details
US3364497A Recording of digital data Expired / Lapsed 1966-05-18 1968-01-16 0 Details
US3353467A Flash photography Expired / Lapsed 1965-05-24 1967-11-21 2 Details
US3353076A Motor control circuit for a stepping motor Expired / Lapsed 1964-11-19 1967-11-14 2 Details
US3341912A Tow interlacing apparatus Expired / Lapsed 1965-11-26 1967-09-19 2 Details
US3336174A Method of making a fibrous filter product Expired / Lapsed 1965-04-06 1967-08-15 2 Details
US3312955A System for recording and retrieving digital information Expired / Lapsed 1963-09-03 1967-04-04 1 Details
US3300451A Chlorinated pivalolactones and polymers thereof Expired / Lapsed 1964-01-07 1967-01-24 3 Details
US3296677A Crimping apparatus and process Expired / Lapsed 1963-05-20 1967-01-10 4 Details
US3295429A Electromagnetic relay exposure controls Expired / Lapsed 1964-05-12 1967-01-03 2 Details
US3296204A Sulfonated polyamides Expired / Lapsed 1962-02-20 1967-01-03 2 Details
US3265529A Breathable fabric with a layer of water-sweliable elastomer Expired / Lapsed 1962-11-20 1966-08-09 2 Details
US3265496A Photoconductive substances for electrophotography Expired / Lapsed 1961-12-29 1966-08-09 2 Details
US3260402A Sheet dispensing device Expired / Lapsed 1964-05-15 1966-07-12 2 Details
US3253523A Photoelectric exposure control system Expired / Lapsed 1963-03-18 1966-05-31 2 Details
US3241438A Cylindrical lens scanning system Expired / Lapsed 1963-06-18 1966-03-22 2 Details
US3236685A Process for treating textile fibers and other shaped produc… Expired / Lapsed 1962-06-20 1966-02-22 2 Details
US3232606A Film feeding arrangement Expired / Lapsed 1964-03-27 1966-02-01 2 Details
US3232201A Fiber optical scanning system Expired / Lapsed 1963-08-14 1966-02-01 2 Details
US3221745A Method of bonding body tissue together using methylenemalon… Expired / Lapsed 1962-09-12 1965-12-07 2 Details
US3221006A 5-amino-3-substituted-1,2,4-thiadiazole azo compounds Expired / Lapsed 1962-11-13 1965-11-30 2 Details
US3220082A Jet apparatus for treatment of textile fibers Expired / Lapsed 1962-03-29 1965-11-30 2 Details
US3205796A Photoelectric exposure meter with variable angular field Expired / Lapsed 1962-10-22 1965-09-14 2 Details
US3206606A Photosensitive inspection method and apparatus Expired / Lapsed 1961-07-20 1965-09-14 2 Details
US3201251A Composite film element Expired / Lapsed 1961-08-21 1965-08-17 1 Details
US3194791A Tin salts catalysts for polyesterification process Expired / Lapsed 1962-02-23 1965-07-13 0 Details
US3194717A Laminated tape structure Expired / Lapsed 1961-11-24 1965-07-13 2 Details
US3194718A Laminated tape structure Expired / Lapsed 1961-11-24 1965-07-13 2 Details
US3190197A Protective colloidal silica lacquer for developed photograp… Expired / Lapsed 1960-08-11 1965-06-22 1 Details
US3188713A Apparatus for processing crosssection yarn Expired / Lapsed 1963-05-06 1965-06-15 1 Details
US3188935A Camera with automatic diaphragm control Expired / Lapsed 1962-08-20 1965-06-15 2 Details
US3189506A Method and apparatus for forming continuous filament filter… Expired / Lapsed 1962-04-12 1965-06-15 2 Details
US3183768A Projection printer Expired / Lapsed 1961-12-18 1965-05-18 2 Details
US3184385A Dry, vitamin-active product and process for preparing same Expired / Lapsed 1961-10-16 1965-05-18 2 Details
US3177872A Vaginal tampon and applicator Expired / Lapsed 1962-11-23 1965-04-13 2 Details
US3176599A Filter compensation device Expired / Lapsed 1963-04-29 1965-04-06 2 Details
US3173188A Tobacco smoke filter formation Expired / Lapsed 1961-11-03 1965-03-16 1 Details
US3147680A Photographic light measuring device Expired / Lapsed 1963-05-07 1964-09-08 2 Details
US3148060A Colloid transfer process and activator solution therefor Expired / Lapsed 1962-12-05 1964-09-08 2 Details
US3137630A Process for preparing a dry, finely divided, gelatin partic… Expired / Lapsed 1961-06-09 1964-06-16 2 Details
US3133044A Continuous process for polymerizing bisphenols and phosgene Expired / Lapsed 1959-03-16 1964-05-12 2 Details
US3128377A Log-time voltage generator Expired / Lapsed 1961-03-27 1964-04-07 2 Details
US3120782A Exposure control system for color printers Expired / Lapsed 1961-03-27 1964-02-11 2 Details
US3113413A Apparatus and method for producing volumized slub yarn Expired / Lapsed 1959-06-08 1963-12-10 2 Details
US3106141A Visual signal for photographic cameras Expired / Lapsed 1959-09-10 1963-10-08 2 Details
US3103731A Textile apparatus for bulking yarns and process Expired / Lapsed 1961-09-18 1963-09-17 2 Details
US3103098A Variable luster yarn and method of manufacture Expired / Lapsed 1961-10-18 1963-09-10 2 Details
US3099594A Method for blooming filter tow Expired / Lapsed 1960-05-05 1963-07-30 2 Details
US3099199A Apparatus for reproducing and recording information Expired / Lapsed 1959-02-09 1963-07-30 1 Details
US3091162A Zoom photometric system Expired / Lapsed 1962-08-06 1963-05-28 2 Details
US3089823A Aqueous vitamin a oil emulsion Expired / Lapsed 1961-09-05 1963-05-14 2 Details
US3083626A Indicators for photoelectrically controlled cameras Expired / Lapsed 1961-06-27 1963-04-02 2 Details
US3081951A Slot venturi fluffing jet Expired / Lapsed 1959-12-02 1963-03-19 2 Details
US3079978A Apparatus for manufacturing filters Expired / Lapsed 1959-05-20 1963-03-05 2 Details
US3079663A Method and apparatus for producing tobacco smoke filters Expired / Lapsed 1958-05-21 1963-03-05 1 Details
US3076718A Lacquer extender Expired / Lapsed 1958-12-08 1963-02-05 4 Details
US3075965A Sulfation of alcohols and polyols with salts of acetyl sulf… Expired / Lapsed 1960-09-16 1963-01-29 2 Details
US3062096A Apparatus for making color prints Expired / Lapsed 1960-02-26 1962-11-06 0 Details
US3057743A Non-crystallizing sucrose lower fatty acid esters and compo… Expired / Lapsed 1959-04-02 1962-10-09 2 Details
US3053661A Polyester film elements and subbing compositions therefor Expired / Lapsed 1958-08-18 1962-09-11 2 Details
US3050430A Jet and method of filter manufacture Expired / Lapsed 1959-11-12 1962-08-21 2 Details
US3043181A Telescopic finder for motion picture cameras Expired / Lapsed 1959-11-25 1962-07-10 0 Details
US3038478A Method for producing rigid tobacco smoke filters Expired / Lapsed 1960-05-23 1962-06-12 2 Details
US3038800A Photopolymerization of olefinicallyunsaturated monomers by … Expired / Lapsed 1957-12-19 1962-06-12 2 Details
US3033814A Poly-alpha-olefins containing a combination of dialkyl-3, 3… Expired / Lapsed 1960-01-25 1962-05-08 2 Details
US3033701A Infrared transmitting optical element Expired / Lapsed 1957-05-20 1962-05-08 2 Details
US3026293A Acrylamidic graft copolymers and their preparation Expired / Lapsed 1959-08-06 1962-03-20 2 Details
US3017309A Method for the manufacture of filters composed of cellulose… Expired / Lapsed 1957-02-21 1962-01-16 2 Details
US3003389A Viewfinder signals for photographic cameras Expired / Lapsed 1961-02-08 1961-10-10 0 Details
US3004004A Hydrophilic polypeptides and their preparation Expired / Lapsed 1958-03-26 1961-10-10 2 Details
US3002003A Azidophthalic anhydrides Expired / Lapsed 1959-10-02 1961-09-26 2 Details
US2999439A Automatic exposure control for photographic camera Expired / Lapsed 1958-12-05 1961-09-12 0 Details
US2996405A Method of quick-setting proteincontaining coatings Expired / Lapsed 1956-07-05 1961-08-15 2 Details
US2992201A Extrusion composition consisting of polyethylene and liquid… Expired / Lapsed 1958-04-09 1961-07-11 2 Details
US2984634A Crystalline polymerized monoolefinic hydrocarbons containin… Expired / Lapsed 1957-01-30 1961-05-16 2 Details
US2972304A Electrostatic printing Expired / Lapsed 1959-06-02 1961-02-21 0 Details
US2968558A Thermo-reversible gels and photographic emulsions prepared … Expired / Lapsed 1955-10-19 1961-01-17 2 Details
US2964636A Optically immersed photoconductive cells Expired / Lapsed 1956-06-05 1960-12-13 0 Details
US2956884A Compositions of polyacrylates with gelatin and other protei… Expired / Lapsed 1957-03-26 1960-10-18 2 Details
US2952198A Impact shutter Expired / Lapsed 1959-01-19 1960-09-13 0 Details
US2945008A Condensation polymers derived from spiroglycols Expired / Lapsed 1956-08-23 1960-07-12 2 Details
US2943937A Surface conditioning and subbing of oriented linear polyest… Expired / Lapsed 1956-06-12 1960-07-05 4 Details
US2932855A Method for forming film or sheeting Expired / Lapsed 1956-09-11 1960-04-19 2 Details
US2932692A Device for printing a selection character on address labels Expired / Lapsed 1959-05-07 1960-04-12 0 Details
US2931802A Mixed esters of glucose and sucrose Expired / Lapsed 1958-04-30 1960-04-05 2 Details
US2928323A Photographic camera with coupled exposure meter Expired / Lapsed 1959-04-29 1960-03-15 0 Details
US2924868A Jet device for blowing yarn and process Expired / Lapsed 1956-09-13 1960-02-16 0 Details
US2921828A Surface treating polyester films and fibers with primary am… Expired / Lapsed 1956-12-03 1960-01-19 2 Details
US2911884A Photographic viewing apparatus Expired / Lapsed 1957-02-11 1959-11-10 0 Details
US2908045A Method for removing false twist and longitudinal folds from… Expired / Lapsed 1955-10-20 1959-10-13 0 Details
US2904174A Identification of sensitized paper or film defects with mag… Expired / Lapsed 1956-01-27 1959-09-15 2 Details
US2901466A Linear polyesters and polyester-amides from 1,4-cyclohexane… Expired / Lapsed 1955-12-22 1959-08-25 2 Details
US2900988A Tobacco smoke filter elements Expired / Lapsed 1954-06-09 1959-08-25 0 Details
US2895006A Apparatus for balancing scanning systems Expired / Lapsed 1952-08-28 1959-07-14 0 Details
US2882262A N-(acryloxyalkyl)- and n-(methacryloxyalkyl)-2-pyrrolidones… Expired / Lapsed 1956-05-14 1959-04-14 2 Details
US2882255A Polyester composition and a vinyl comprising pyrrolidone po… Expired / Lapsed 1955-07-20 1959-04-14 2 Details
US2881771A Cigarette filters Expired / Lapsed 1954-12-20 1959-04-14 2 Details
US2881769A Fibrous cigarette filters Expired / Lapsed 1954-03-03 1959-04-14 2 Details
US2856638A Process for the after-treatment of polymeric articles Expired / Lapsed 1954-07-20 1958-10-21 1 Details
US2856386A Allyl carbamate homopolymers and copolymers Expired / Lapsed 1954-02-01 1958-10-14 2 Details
US2853457A Polymeric hydrosols comprising an unsaturated protein deriv… Expired / Lapsed 1953-12-14 1958-09-23 2 Details
US2852433A Method of making enteric medicament compositions Expired / Lapsed 1956-03-07 1958-09-16 2 Details
US2852378A Subbing photographic film Expired / Lapsed 1955-11-01 1958-09-16 2 Details
US2847709A Process of producing unoriented formed articles from high p… Expired / Lapsed 1955-03-14 1958-08-19 2 Details
CA560335A 2-amino-3-nitro-5-acylthiophene azo dye compounds Expired / Lapsed — 1958-07-15 0 Details
US2843580A Metallized azo dyes prepared by coupling amino-phenols to d… Expired / Lapsed 1956-04-04 1958-07-15 2 Details
US2843572A Preparation of vinylidene chloride interpolymers of improve… Expired / Lapsed 1954-12-30 1958-07-15 2 Details
US2843567A Alkaline earth metal titanium alkoxide catalysts for prepar… Expired / Lapsed 1954-12-20 1958-07-15 2 Details
US2835582A Gelatin-polymeric hydrosol mixtures and photographic articl… Expired / Lapsed 1954-02-03 1958-05-20 1 Details
US2831826A Mixtures of acrylic nitrile-ethylenic chloride copolymers w… Expired / Lapsed 1954-12-30 1958-04-22 2 Details
US2831832A Copolyesters of a glycol, sulfonyldi-benzoic acid and omega… Expired / Lapsed 1954-09-09 1958-04-22 2 Details
US2828752A Fibrous tobacco smoke filters Expired / Lapsed 1954-08-16 1958-04-01 2 Details
US2827835A Petzval type projection objective having a concavely curved… Expired / Lapsed 1956-05-31 1958-03-25 0 Details
US2828290A Copolyesters of a glycol, an aromatic dibasic acid, and a s… Expired / Lapsed 1954-09-15 1958-03-25 2 Details
US2827450A 2-aminothiophene azo compounds Expired / Lapsed 1955-08-12 1958-03-18 2 Details
US2824090A Polymerization of alpha-olefins with a catalyst mixture of … Expired / Lapsed 1955-12-27 1958-02-18 4 Details
US2822339A Preparation of orientable protein-containing polymers Expired / Lapsed 1955-01-24 1958-02-04 2 Details
US2819649A Reflecting condenser system for projectors Expired / Lapsed 1956-02-01 1958-01-14 0 Details
US2815761A Fibrous tobacco smoke filter Expired / Lapsed 1956-02-29 1957-12-10 2 Details
US2811510A Light-sensitive polymeric stilbazoles and quaternary salts … Expired / Lapsed 1955-09-15 1957-10-29 2 Details
US2811409A Spinning of acrylonitrile polymer fibers Expired / Lapsed 1952-12-31 1957-10-29 2 Details
US2808518A Adjusting d. c. resistance of lightsensitive cells Expired / Lapsed 1956-01-06 1957-10-01 0 Details
US2807981A Sighting telescope Expired / Lapsed 1955-03-14 1957-10-01 0 Details
US2808390A Interpolyesters from aromatic dibasic acids and omega-hydro… Expired / Lapsed 1954-07-26 1957-10-01 2 Details
US2807864A Composition and process for treating yarn Expired / Lapsed 1954-06-24 1957-10-01 2 Details
US2808259A Continuous film loop holder for repeating projectors Expired / Lapsed 1953-06-10 1957-10-01 0 Details
US2805218A 2-amino-3-nitro-5-acylthiophene azo dye compounds Expired / Lapsed 1954-04-05 1957-09-03 2 Details
US2801188A Coated gelating light filter Expired / Lapsed 1955-03-17 1957-07-30 1 Details
US2801171A Photographic color former dispersions Expired / Lapsed 1954-12-20 1957-07-30 2 Details
US2801170A Preparation of color former dispersions Expired / Lapsed 1954-12-20 1957-07-30 2 Details
US2797804A Light-and moistureproof protection for rolls of light-sensi… Expired / Lapsed 1955-01-27 1957-07-02 0 Details
US2798063A Interpolymers of vinylpyridines or vinylquinolines, acrylic… Expired / Lapsed 1954-02-05 1957-07-02 2 Details
US2795328A Sorting device for information bearing elements Expired / Lapsed 1955-02-23 1957-06-11 0 Details
US2794366A Automatic exposure control system for photographic printer Expired / Lapsed 1956-02-29 1957-06-04 0 Details
US2794742A Photographic elements and their preparation Expired / Lapsed 1955-08-03 1957-06-04 2 Details
US2794239A Tow for use in the production of tobacco smoke filters Expired / Lapsed 1952-12-05 1957-06-04 2 Details
US2784115A Method of producing titanium dioxide coatings Expired / Lapsed 1953-05-04 1957-03-05 1 Details
US2784251A Apparatus for translating into legible form characters repr… Expired / Lapsed 1950-08-24 1957-03-05 0 Details
US2780348A Container for photographic objectives, filters, supplementa… Expired / Lapsed 1955-01-19 1957-02-05 0 Details
US2780228A Filters for tobacco smoke comprising cellulose esters and e… Expired / Lapsed 1954-03-03 1957-02-05 2 Details
US2780130A Reflex sight having a dichroic beamcombining mirror Expired / Lapsed 1954-01-29 1957-02-05 0 Details
US2773050A Water vapor permeable compositions and articles containing … Expired / Lapsed 1952-04-30 1956-12-04 1 Details
US2768080A Hydrophilic high polymer hydrosols and gelating emulsions Expired / Lapsed 1954-02-18 1956-10-23 2 Details
US2767474A Footage indicator for strip material Expired / Lapsed 1953-06-15 1956-10-23 0 Details
US2763552A Modifiers for photographic packet emulsions Expired / Lapsed 1954-12-20 1956-09-18 2 Details
US2763566A Benzal-alpha-methyl-alpha-phenylhydrazones and derivatives … Expired / Lapsed 1954-02-19 1956-09-18 1 Details
US2759393A Optical aligners employing axicons Expired / Lapsed 1952-10-25 1956-08-21 0 Details
US2750653A Yarn structure Expired / Lapsed 1955-01-19 1956-06-19 4 Details
US2747997A Decoration of cellulosic, metal and vitreous surfaces Expired / Lapsed 1952-10-01 1956-05-29 0 Details
US2743261A Copolymer of alpha-dibutylphosphonatostyrene and acrylonitr… Expired / Lapsed 1953-01-21 1956-04-24 0 Details
US2737688A Tow opening device Expired / Lapsed 1953-05-25 1956-03-13 2 Details
US2728664A Photographic emulsions containing mercury salts Expired / Lapsed 1952-11-08 1955-12-27 2 Details
US2725296A Two-layer integral negative positive photographic material Expired / Lapsed 1951-09-14 1955-11-29 2 Details
US2720507A Organo-metallic tin catalysts for preparation of polyesters Expired / Lapsed 1952-10-03 1955-10-11 2 Details
US2720505A Tetra-alkyl lead catalysts for the preparation of polyesters Expired / Lapsed 1952-10-03 1955-10-11 2 Details
US2719136A Compositions from polymerizing acrylonitrile in the presenc… Expired / Lapsed 1951-11-29 1955-09-27 2 Details
US2698794A Mixed packet photographic emulsions Expired / Lapsed 1950-04-15 1955-01-04 2 Details
US2691696A Electrooptical unsharp masking in color reproduction Expired / Lapsed 1950-10-27 1954-10-12 0 Details
US2690966A Photomechanical resist Expired / Lapsed 1951-01-20 1954-10-05 2 Details
US2688155A Apparatus and method for controlling the application of pla… Expired / Lapsed 1953-03-16 1954-09-07 0 Details
US2686751A Vitamin a stabilization Expired / Lapsed 1952-05-10 1954-08-17 2 Details
US2685508A High wet strength paper and its preparation Expired / Lapsed 1950-12-01 1954-08-03 2 Details
US2685668A Power pack for flash holders Expired / Lapsed 1950-11-10 1954-08-03 0 Details
US2682573A Means for detecting errors in apparatus for analyzing coded… Expired / Lapsed 1952-03-21 1954-06-29 0 Details
US2675315A Photosensitive coating containing a hydrophilic colloid and… Expired / Lapsed 1949-12-13 1954-04-13 2 Details
US2672786A Motion-picture register gauge Expired / Lapsed 1951-11-24 1954-03-23 0 Details
US2659665A Reticles Expired / Lapsed 1950-10-27 1953-11-17 2 Details
US2659652A High-speed multiplex recording apparatus Expired / Lapsed 1950-07-18 1953-11-17 0 Details
US2657191A Polymerization of acrylonitrile in the presence of preforme… Expired / Lapsed 1950-12-01 1953-10-27 2 Details
US2656360A Process for preparing n-acyl derivatives of maide compounds Expired / Lapsed 1951-05-23 1953-10-20 2 Details
US2652345A Method of setting protein containing coatings with ammonium Expired / Lapsed 1952-04-29 1953-09-15 1 Details
US2651458A Automatic sequence-controlled computer Expired / Lapsed 1951-01-24 1953-09-08 0 Details
US2649387A Method of forming nonreflecting coating on glass Expired / Lapsed 1950-10-27 1953-08-18 2 Details
US2649434A Polymerization of acrylonitrile in the presence of preforme… Expired / Lapsed 1950-05-27 1953-08-18 2 Details
US2645673A Process of producing acetylene Expired / Lapsed 1945-12-08 1953-07-14 2 Details
US2641954A Protective coatings for optical elements and methods for ap… Expired / Lapsed 1950-05-06 1953-06-16 1 Details
US2641956A Film-perforation pitch gauge Expired / Lapsed 1948-08-21 1953-06-16 0 Details
US2632204A Apparatus for the continuous extrusion of decorative thermo… Expired / Lapsed 1951-02-14 1953-03-24 0 Details
US2632704A Method of preparing silver-halide dispersions Expired / Lapsed 1950-03-31 1953-03-24 2 Details
US2632369A Film measuring mechanism Expired / Lapsed 1949-10-22 1953-03-24 0 Details
US2632004A Resin azo dye Expired / Lapsed 1949-09-29 1953-03-17 2 Details
US2620324A Polymerization of acrylonitrile in the presence of amide po… Expired / Lapsed 1950-12-01 1952-12-02 2 Details
US2618702A Variable underlap drum facsimile transmitting apparatus Expired / Lapsed 1950-06-23 1952-11-18 0 Details
US2614430A Temperature indicating device Expired / Lapsed 1950-02-01 1952-10-21 0 Details
US2610120A Photosensitization of polymeric cinnamic acid esters Expired / Lapsed 1950-03-09 1952-09-09 2 Details
US2607267A Optical system for the inspection of curved profiles Expired / Lapsed 1950-03-29 1952-08-19 0 Details
US2607745A Composition useful as an antioxidant for fats and oils Expired / Lapsed 1949-05-05 1952-08-19 2 Details
US2604002A Optical infinity sight Expired / Lapsed 1944-11-28 1952-07-22 0 Details
US2596656A Method of precipitating high acetyl cellulose acetate Expired / Lapsed 1951-03-06 1952-05-13 1 Details
US2596741A External memory device for electronic digital computers Expired / Lapsed 1948-08-28 1952-05-13 0 Details
US2592260A Can sorting machine Expired / Lapsed 1949-01-19 1952-04-08 0 Details
US2589014A Focusing view finder system Expired / Lapsed 1951-02-14 1952-03-11 0 Details
US2584660A Vacuum coating process and apparatus therefor Expired / Lapsed 1949-09-24 1952-02-05 0 Details
US2582085A Wide-angle lens attachment with front element of high index… Expired / Lapsed 1950-09-01 1952-01-08 0 Details
US2582087A Method of blocking and unblocking lens blanks for surfacing… Expired / Lapsed 1948-12-08 1952-01-08 0 Details
US2582004A Motion-picture sensitometry Expired / Lapsed 1947-10-02 1952-01-08 0 Details
US2578299A Vector analogue computing mechanism Expired / Lapsed 1946-01-12 1951-12-11 0 Details
US2575017A Apparatus for synthesizing facsimile signals from coded sig… Expired / Lapsed 1950-07-29 1951-11-13 0 Details
US2575006A Mixtures comprising polyacrylonitrile and polymeric ester-l… Expired / Lapsed 1950-04-29 1951-11-13 2 Details
US2575034A Reader for translating digital data recorded on film into e… Expired / Lapsed 1949-09-22 1951-11-13 0 Details
US2575012A Rapid film wind device Expired / Lapsed 1947-12-30 1951-11-13 0 Details
US2571678A Yarn tensioning device Expired / Lapsed 1947-08-23 1951-10-16 0 Details
US2569470A Compositions comprising acrylonitrile and hydrolyzed polyvi… Expired / Lapsed 1950-06-07 1951-10-02 2 Details
US2566266A Pressure equalizing device Expired / Lapsed 1949-12-20 1951-08-28 2 Details
US2566277A Method for making color prints Expired / Lapsed 1947-08-16 1951-08-28 0 Details
US2566264A Method of making color prints Expired / Lapsed 1946-05-10 1951-08-28 0 Details
US2563780A Optical aligning device Expired / Lapsed 1950-03-07 1951-08-07 0 Details
US2560646A Oil vapor pump Expired / Lapsed 1948-06-04 1951-07-17 0 Details
US2556550A Heat sensitive printing element and method Expired / Lapsed 1947-02-27 1951-06-12 0 Details
US2551650A Measurement of temperature distribution on the surface of s… Expired / Lapsed 1949-02-11 1951-05-08 0 Details
US2552238A Profile projector and optical comparator Expired / Lapsed 1948-12-09 1951-05-08 0 Details
US2552280A Episcopic illuminator for optical projection comparators Expired / Lapsed 1948-12-09 1951-05-08 0 Details
US2550644A Endorsing machine Expired / Lapsed 1945-01-25 1951-04-24 0 Details
US2548573A Apparatus for processing continuous film Expired / Lapsed 1946-12-17 1951-04-10 0 Details
US2544905A Method of making photographic relief images Expired / Lapsed 1948-10-23 1951-03-13 2 Details
US2544879A Film metering double exposure prevention camera Expired / Lapsed 1947-09-18 1951-03-13 0 Details
US2543013A Printing plate and method of printing Expired / Lapsed 1947-04-30 1951-02-27 2 Details
US2541476A Light-tight film cartridge Expired / Lapsed 1949-10-12 1951-02-13 0 Details
US2541484A Objectives of petzval type with a high index collective len… Expired / Lapsed 1948-12-17 1951-02-13 0 Details
US2533530A Photosensitive coating containing rubber latex Expired / Lapsed 1947-05-03 1950-12-12 1 Details
US2532315A Apparatus and process for evacuating electronic tubes and t… Expired / Lapsed 1949-04-02 1950-12-05 0 Details
US2525549A Two-blade shutter-leaf control Expired / Lapsed 1949-03-26 1950-10-10 0 Details
US2525532A Simultaneously developing and fixing photographic images Expired / Lapsed 1946-10-18 1950-10-10 0 Details
US2525530A Method for producing vinyl trifluoroacetate Expired / Lapsed 1946-03-14 1950-10-10 2 Details
US2521902A N-fluoroalkylacrylamides and polymers thereof Expired / Lapsed 1948-04-06 1950-09-12 2 Details
US2521954A Apparatus for making color prints Expired / Lapsed 1947-08-28 1950-09-12 0 Details
US2518671A Focusing mechanism for lens mounts Expired / Lapsed 1947-05-10 1950-08-15 0 Details
US2511224A Fluoride glass Expired / Lapsed 1944-12-15 1950-06-13 1 Details
US2510200A Facsimile system with selected area scanning Expired / Lapsed 1948-01-21 1950-06-06 0 Details
US2503714A Filter holder for projectors Expired / Lapsed 1948-12-08 1950-04-11 0 Details
US2503759A Evaporography Expired / Lapsed 1947-08-16 1950-04-11 0 Details
US2500218A Process for preparing 1, 1, 1-trifluoro-2-bromoethane Expired / Lapsed 1947-10-24 1950-03-14 2 Details
US2500028A Fine-grained bichromate sensitized photographic material Expired / Lapsed 1948-07-09 1950-03-07 2 Details
US2500046A Petzval-type photographic objective Expired / Lapsed 1948-01-03 1950-03-07 0 Details
US2500051A Optical projection system for inspecting alignment of typew… Expired / Lapsed 1947-06-02 1950-03-07 0 Details
US2500049A Apparatus for making color prints Expired / Lapsed 1946-05-10 1950-03-07 0 Details
US2496940A Mixed grain photographic process Expired / Lapsed 1948-10-21 1950-02-07 2 Details
US2496928A Bayonet lock Expired / Lapsed 1947-12-06 1950-02-07 0 Details
US2496943A Sound film scanning apparatus with automatic light variatio… Expired / Lapsed 1946-10-19 1950-02-07 0 Details
US2496933A Linear polyesters of hydroquinone, saturated glycols and di… Expired / Lapsed 1946-05-25 1950-02-07 2 Details
US2494041A Derivatives obtained by reacting gelatin and furoyl halides Expired / Lapsed 1947-08-13 1950-01-10 2 Details
US2490749A Mixed grain photographic emulsions Expired / Lapsed 1948-09-03 1949-12-06 0 Details
US2487885A Copolymers of beta-propionolactone Expired / Lapsed 1947-09-12 1949-11-15 0 Details
US2486190A Imidized polyacrylamides Expired / Lapsed 1946-07-22 1949-10-25 0 Details
US2484487A Process for preparing glycol monoesters of acrylic and alph… Expired / Lapsed 1948-09-08 1949-10-11 0 Details
US2484430A Quaternary salts of polyvinyl pyridine and polyvinyl quinol… Expired / Lapsed 1946-12-31 1949-10-11 0 Details
US2481694A Illumination control for photographic copying apparatus Expired / Lapsed 1946-04-05 1949-09-13 0 Details
US2478384A Control device for projection printers Expired / Lapsed 1946-01-12 1949-08-09 0 Details
US2476426A Apparatus for testing porro prisms using nonparallel light Expired / Lapsed 1945-05-02 1949-07-19 0 Details
US2472128A Coloring ceramic objects Expired / Lapsed 1947-05-03 1949-06-07 0 Details
US2472605A Method of depositing optical interference coatings Expired / Lapsed 1946-04-15 1949-06-07 0 Details
US2466510A Borate optical glass Expired / Lapsed 1946-08-09 1949-04-05 0 Details
US2466507A Method of making fluoride glass Expired / Lapsed 1946-05-15 1949-04-05 0 Details
US2466506A Fluoride glasses Expired / Lapsed 1946-04-06 1949-04-05 0 Details
US2466455A Reflecting means for folding the light path in optical syst… Expired / Lapsed 1946-03-30 1949-04-05 0 Details
US2466430A Construction for projection lamps Expired / Lapsed 1945-03-31 1949-04-05 0 Details
US2466404A Polyvinyl carbamates Expired / Lapsed 1944-03-08 1949-04-05 0 Details
US2464141A Mirror with low thermal expansion support Expired / Lapsed 1946-07-13 1949-03-08 0 Details
US2464155A Stop bath acidity indicator Expired / Lapsed 1945-02-09 1949-03-08 0 Details
US2461190A Adjustable mount for optical elements Expired / Lapsed 1945-08-04 1949-02-08 0 Details
US2461166A Instrument for testing the accuracy of the angle between tw… Expired / Lapsed 1945-05-02 1949-02-08 0 Details
US2458348A Electric resistance film hygrometer Expired / Lapsed 1944-05-06 1949-01-04 0 Details
US2458448A Gun training by tracer fire spotting Expired / Lapsed 1944-02-26 1949-01-04 0 Details
US2455731A Resinous condensates of beta-propionolactone and polyhydrox… Expired / Lapsed 1947-09-10 1948-12-07 0 Details
US2455790A Enteric coatings Expired / Lapsed 1945-06-09 1948-12-07 0 Details
US2455763A Interferometric light valve Expired / Lapsed 1945-03-31 1948-12-07 0 Details
US2450751A Constant flow pump Expired / Lapsed 1946-03-07 1948-10-05 0 Details
US2450761A Flicker photometers, particularly for measuring the contras… Expired / Lapsed 1945-06-09 1948-10-05 0 Details
US2449966A Integral mask for color film Expired / Lapsed 1944-05-03 1948-09-21 0 Details
US2448892A Oxidation of cellulose Expired / Lapsed 1945-01-01 1948-09-07 0 Details
US2446628A Flatness testing apparatus Expired / Lapsed 1947-03-06 1948-08-10 0 Details
US2446668A Combined camera, processing apparatus, and projector Expired / Lapsed 1945-06-19 1948-08-10 0 Details
US2439081A Polymers of cyanoacrylic acid derivatives Expired / Lapsed 1944-05-05 1948-04-06 0 Details
US2439108A Coating with polyvinyl alcohol Expired / Lapsed 1943-09-11 1948-04-06 0 Details
US2430551A Optical support Expired / Lapsed 1945-04-28 1947-11-11 0 Details
US2430585A Lubricated photographic film and process of preparation Expired / Lapsed 1944-03-01 1947-11-11 0 Details
US2425390A Forming flanged or beaded containers Expired / Lapsed 1946-01-15 1947-08-12 0 Details
US2425400A High aperture collimating lens system Expired / Lapsed 1943-11-27 1947-08-12 0 Details
US2423718A Stadiametric range finder Expired / Lapsed 1946-02-20 1947-07-08 0 Details
US2423707A Fabric or gauze of uniformly oxidized cellulose Expired / Lapsed 1945-03-02 1947-07-08 0 Details
US2419975A Increasing speed and contrast of photographic emulsions Expired / Lapsed 1943-08-26 1947-05-06 0 Details
US2417404A Resinous copolymer of a diacylated of an unsaturated aldehy… Expired / Lapsed 1943-05-25 1947-03-11 0 Details
US2415644A Method and apparatus for continuously applying a coating to… Expired / Lapsed 1942-11-16 1947-02-11 0 Details
US2413399A Artificial horizon Expired / Lapsed 1943-08-24 1946-12-31 0 Details
US2410667A Artificial horizon for sighting instruments Expired / Lapsed 1944-04-18 1946-11-05 0 Details
US2410616A Apparatus for molding lenses Expired / Lapsed 1943-09-04 1946-11-05 0 Details
US2409986A Coating compositions for moistureproofing by hot melt coati… Expired / Lapsed 1944-03-18 1946-10-22 0 Details
US2405731A Variable circle for stadiametric range finders Expired / Lapsed 1943-12-17 1946-08-13 0 Details
US2405729A Four-component objective Expired / Lapsed 1943-11-20 1946-08-13 0 Details
US2403892A Photographing device Expired / Lapsed 1944-10-27 1946-07-09 0 Details
US2403734A Bottle cap Expired / Lapsed 1943-10-23 1946-07-09 0 Details
US2403731A Beam splitter Expired / Lapsed 1943-04-01 1946-07-09 0 Details
US2403730A Explosively actuated high-speed shutter Expired / Lapsed 1943-03-27 1946-07-09 0 Details
US2403004A Deesterification of copolymers of acrylic esters and vinyl … Expired / Lapsed 1942-07-10 1946-07-02 0 Details
US2401697A Range finder Expired / Lapsed 1943-03-13 1946-06-04 0 Details
US2401705A Range finder Expired / Lapsed 1943-03-13 1946-06-04 0 Details
US2401691A Photoelectric range finder Expired / Lapsed 1941-07-18 1946-06-04 0 Details
US2394635A Magnifying lens system Expired / Lapsed 1944-07-13 1946-02-12 0 Details
US2394930A Formation of mirrors by thermal evaporation Expired / Lapsed 1943-07-03 1946-02-12 0 Details
US2393794A Cellulose organic acid ester plastics containing resacetoph… Expired / Lapsed 1945-02-28 1946-01-29 0 Details
US2393782A Ocular Expired / Lapsed 1943-05-01 1946-01-29 0 Details
US2391127A Antihalation coatings Expired / Lapsed 1942-02-17 1945-12-18 0 Details
US2388858A Stereo trainer Expired / Lapsed 1943-09-02 1945-11-13 0 Details
US2389087A Automatic adjustment of lens diaphragms Expired / Lapsed 1941-12-06 1945-11-13 0 Details
US2386626A Drawing surface Expired / Lapsed 1943-01-30 1945-10-09 0 Details
US2386601A Distillation control Expired / Lapsed 1942-07-03 1945-10-09 0 Details
US2384643A Objective for reflex sight Expired / Lapsed 1944-03-01 1945-09-11 0 Details
US2384655A Two-film camera Expired / Lapsed 1944-01-26 1945-09-11 0 Details
US2382640A Resinous polymer of methylene dioxolane Expired / Lapsed 1943-09-08 1945-08-14 0 Details
US2382623A Automatic shutter Expired / Lapsed 1943-05-04 1945-08-14 0 Details
US2380216A Lens system Expired / Lapsed 1942-02-09 1945-07-10 0 Details
US2376207A Drier for photographic material Expired / Lapsed 1943-08-21 1945-05-15 0 Details
US2376166A Sensitometry Expired / Lapsed 1942-06-05 1945-05-15 0 Details
US2376162A Photographic shutter tester Expired / Lapsed 1941-03-05 1945-05-15 0 Details
US2374475A Sighting device Expired / Lapsed 1944-01-17 1945-04-24 0 Details
US2362572A Electrical process of producing villous or pubescent synthe… Expired / Lapsed 1943-11-04 1944-11-14 0 Details
US2362434A Transparency mount Expired / Lapsed 1942-05-08 1944-11-07 0 Details
US2360298A Optical system Expired / Lapsed 1944-01-04 1944-10-10 0 Details
US2358083A Exposure control device Expired / Lapsed 1942-02-16 1944-09-12 0 Details
US2358169A Photographic printing material Expired / Lapsed 1941-03-14 1944-09-12 0 Details
US2353262A Preventing crystallization of couplers Expired / Lapsed 1942-11-24 1944-07-11 0 Details
US2353218A Photographic printing apparatus Expired / Lapsed 1941-03-14 1944-07-11 0 Details
US2350742A Gelation coating process Expired / Lapsed 1940-12-19 1944-06-06 0 Details
US2350112A Lens system Expired / Lapsed 1942-03-02 1944-05-30 0 Details
US2346076A Combined view and range finder for cameras Expired / Lapsed 1942-06-19 1944-04-04 0 Details
US2343690A Camera exposure control Expired / Lapsed 1942-10-14 1944-03-07 0 Details
US2343850A Projector control Expired / Lapsed 1941-03-14 1944-03-07 0 Details
US2341410A Combined range and view finder for cameras Expired / Lapsed 1943-03-11 1944-02-08 0 Details
US2341431A Lamp socket Expired / Lapsed 1942-06-22 1944-02-08 0 Details
US2341361A Numbering stamp for printing machines Expired / Lapsed 1941-10-03 1944-02-08 0 Details
US2341378A Film clamping mechanism for projectors Expired / Lapsed 1941-02-15 1944-02-08 0 Details
US2339433A Method of forming optical surfaces on plastic material Expired / Lapsed 1940-12-07 1944-01-18 0 Details
US2338596A Feeding and severing means for strip material Expired / Lapsed 1942-12-11 1944-01-04 0 Details
US2338654A Projection screen Expired / Lapsed 1942-04-08 1944-01-04 0 Details
US2338657A Shutter and camera structure Expired / Lapsed 1942-01-30 1944-01-04 0 Details
US2338587A Method of treating cellulose esters Expired / Lapsed 1941-02-24 1944-01-04 0 Details
US2336330A Range finder Expired / Lapsed 1941-07-19 1943-12-07 0 Details
US2336292A Process for forming decorative sheeting Expired / Lapsed 1941-02-04 1943-12-07 0 Details
US2336299A Sensitive material Expired / Lapsed 1940-04-25 1943-12-07 0 Details
US2336273A Production of laminated structures Expired / Lapsed 1939-05-08 1943-12-07 0 Details
US2333772A Speed control for motor driven cameras Expired / Lapsed 1942-06-04 1943-11-09 0 Details
US2333768A Aerial camera Expired / Lapsed 1941-06-23 1943-11-09 0 Details
US2333770A Conditioning cellulose acetate yarn Expired / Lapsed 1938-12-16 1943-11-09 0 Details
US2331716A Nonreflecting coating Expired / Lapsed 1940-09-26 1943-10-12 0 Details
US2327811A Engraving machine Expired / Lapsed 1942-04-01 1943-08-24 0 Details
US2327790A Camera bellows and method of making same Expired / Lapsed 1941-09-23 1943-08-24 0 Details
US2327759A Telephoto objective Expired / Lapsed 1941-07-26 1943-08-24 0 Details
US2327828A Colloidal carbon antihalation layer Expired / Lapsed 1941-03-26 1943-08-24 0 Details
US2326058A Photographic stripping material Expired / Lapsed 1942-07-30 1943-08-03 0 Details
US2321998A Two-compartment container Expired / Lapsed 1942-04-04 1943-06-15 0 Details
US2322023A Device for exhibiting transparencies Expired / Lapsed 1941-11-26 1943-06-15 0 Details
US2322044A Photographic estimating and calculating device Expired / Lapsed 1941-08-15 1943-06-15 0 Details
US2322024A Method of burnishing screw stick heads Expired / Lapsed 1941-06-21 1943-06-15 0 Details
US2322006A Photographic filter and antihalation layer Expired / Lapsed 1940-12-26 1943-06-15 0 Details
US2322027A Color photography Expired / Lapsed 1940-12-26 1943-06-15 0 Details
US2322005A Photographic bleach-out layer Expired / Lapsed 1940-12-26 1943-06-15 0 Details
US2322067A Flashlight synchronizing device Expired / Lapsed 1940-06-20 1943-06-15 0 Details
US2318341A Process for the polymerization of aliphatic aldehydes Expired / Lapsed 1937-07-22 1943-05-04 0 Details
US2313543A Electro-optical system Expired / Lapsed 1941-11-01 1943-03-09 0 Details
US2313567A Range and depth of field finders for cameras Expired / Lapsed 1940-07-24 1943-03-09 0 Details
US2313565A Resin and its preparation Expired / Lapsed 1939-10-31 1943-03-09 0 Details
US2311059A Photographic silver halide emulsion Expired / Lapsed 1941-10-30 1943-02-16 0 Details
US2311101A Densitometer Expired / Lapsed 1941-03-06 1943-02-16 0 Details
US2308034A Film forming apparatus Expired / Lapsed 1941-04-07 1943-01-12 0 Details
US2308015A Sound reproduction Expired / Lapsed 1940-10-18 1943-01-12 0 Details
US2307783A Method of coating Expired / Lapsed 1939-05-24 1943-01-12 0 Details
US2304984A Lens mount Expired / Lapsed 1939-07-25 1942-12-15 0 Details
US2298413A Means for positioning lantern slides Expired / Lapsed 1941-04-24 1942-10-13 0 Details
US2298733A Filter dye and photographic material containing the same Expired / Lapsed 1941-03-29 1942-10-13 0 Details
US2298344A Photographic printing apparatus Expired / Lapsed 1941-03-22 1942-10-13 0 Details
US2298432A Lubrication and fugitive tinting of synthetic yarns Expired / Lapsed 1940-12-16 1942-10-13 0 Details
US2298422A Sound printer Expired / Lapsed 1939-07-25 1942-10-13 0 Details
US2294957A Method of crimping textile fibers Expired / Lapsed 1940-11-23 1942-09-08 0 Details
US2295000A Rapid selector-calculator Expired / Lapsed 1938-06-23 1942-09-08 0 Details
US2292312A Stereoscopic film mount Expired / Lapsed 1940-06-18 1942-08-04 0 Details
US2289738A Color correction Expired / Lapsed 1940-09-13 1942-07-14 0 Details
US2289753A Air squeegee Expired / Lapsed 1939-06-17 1942-07-14 0 Details
US2286730A Electric circuit for color correction Expired / Lapsed 1941-05-14 1942-06-16 0 Details
US2286794A Yarn conditioning process and composition therefor Expired / Lapsed 1940-10-09 1942-06-16 0 Details
US2286819A Nonreflecting coating for glass Expired / Lapsed 1940-09-28 1942-06-16 0 Details
US2286809A Method of applying screws to work Expired / Lapsed 1940-04-30 1942-06-16 0 Details
US2286792A Yarn conditioning process and composition therefor Expired / Lapsed 1940-02-24 1942-06-16 0 Details
US2284877A Light sensitive color element Expired / Lapsed 1941-05-22 1942-06-02 0 Details
US2282001A Color-forming gelatin compound Expired / Lapsed 1940-09-12 1942-05-05 0 Details
US2282009A Manufacture of vinyl resin film and sheeting Expired / Lapsed 1939-12-09 1942-05-05 0 Details
US2279410A Antistatic layers Expired / Lapsed 1941-02-18 1942-04-14 0 Details
US2279502A Yarn conditioning process and composition therefor Expired / Lapsed 1940-10-09 1942-04-14 0 Details
US2279501A Yarn conditioning process and compositions therefor Expired / Lapsed 1940-10-09 1942-04-14 0 Details
US2279463A Film handling apparatus Expired / Lapsed 1939-12-27 1942-04-14 0 Details
US2279366A Cellulose derivative crepe sheeting Expired / Lapsed 1936-03-17 1942-04-14 0 Details
US2276323A Photographic silver halide emulsion Expired / Lapsed 1940-12-05 1942-03-17 0 Details
US2271239A Nonreflecting coating for galss Expired / Lapsed 1940-09-28 1942-01-27 0 Details
US2269217A Mixed polyvinyl acetal resin Expired / Lapsed 1938-01-29 1942-01-06 0 Details
US2269216A Polyvinyl acetal resin Expired / Lapsed 1938-01-29 1942-01-06 0 Details
US2263008A Holder for lenses during surface coating Expired / Lapsed 1940-09-28 1941-11-18 0 Details
US2262989A Method for forming thermoplastic sheeting Expired / Lapsed 1938-03-26 1941-11-18 0 Details
US2258991A Manufacture of laminated glass Expired / Lapsed 1937-03-02 1941-10-14 0 Details
US2256391A Method for preparing oxidized cellulose Expired / Lapsed 1940-12-05 1941-09-16 0 Details
US2256385A Projection printer Expired / Lapsed 1940-08-07 1941-09-16 0 Details
US2256397A Projection printer Expired / Lapsed 1940-08-07 1941-09-16 0 Details
US2256399A Mailing card Expired / Lapsed 1939-01-24 1941-09-16 0 Details
US2253054A Device for measuring flatness of glass Expired / Lapsed 1939-09-13 1941-08-19 0 Details
US2253086A Color photography Expired / Lapsed 1937-01-16 1941-08-19 0 Details
US2249538A Reversible gel compositions of polyvinyl alcohol and substi… Expired / Lapsed 1940-02-12 1941-07-15 0 Details
US2247499A Screw stick Expired / Lapsed 1939-11-28 1941-07-01 0 Details
US2246006A Shutter trigger lock Expired / Lapsed 1939-10-05 1941-06-17 0 Details
US2245257A Lens mount Expired / Lapsed 1939-07-25 1941-06-10 0 Details
US2245236A Method of increasing infrared sensitivity Expired / Lapsed 1939-04-28 1941-06-10 0 Details
US2245429A Manufacture of photographic film base Expired / Lapsed 1937-05-18 1941-06-10 0 Details
US2241225A Curing of synthetic resin films Expired / Lapsed 1939-12-09 1941-05-06 0 Details
US2241231A Friction drive for photographic apparatus of the magazine t… Expired / Lapsed 1938-07-07 1941-05-06 0 Details
US2238482A Footage indicator for film handling apparatus Expired / Lapsed 1939-05-06 1941-04-15 0 Details
US2234697A Method and apparatus for optical scanning Expired / Lapsed 1939-08-11 1941-03-11 0 Details
US2234717A Photo copying machine Expired / Lapsed 1939-03-22 1941-03-11 0 Details
US2232990A Preparation of oxycellulose Expired / Lapsed 1938-07-15 1941-02-25 0 Details
US2231743A Roll film holder for projectors Expired / Lapsed 1939-02-11 1941-02-11 0 Details
US2231668A Electric circuit Expired / Lapsed 1938-06-25 1941-02-11 0 Details
US2229848A Indicator for photographic apparatus Expired / Lapsed 1940-03-28 1941-01-28 0 Details
US2227986A Lantern slide frame Expired / Lapsed 1940-04-10 1941-01-07 0 Details
US2227963A Azo compounds and material colored therewith Expired / Lapsed 1939-07-25 1941-01-07 0 Details
US2227987A Automatic projection printer Expired / Lapsed 1938-07-26 1941-01-07 0 Details
US2227982A Method of hardening photographic gelatin Expired / Lapsed 1936-10-23 1941-01-07 0 Details
US2226186A Film casting element Expired / Lapsed 1937-11-19 1940-12-24 0 Details
US2218241A Double exposure prevention device Expired / Lapsed 1939-08-12 1940-10-15 0 Details
US2218253A Method and means for measuring color Expired / Lapsed 1938-02-23 1940-10-15 0 Details
US2216446A Polyazo compounds and material colored therewith Expired / Lapsed 1939-05-25 1940-10-01 0 Details
US2213745A Making silver-free three-color prints Expired / Lapsed 1938-08-19 1940-09-03 0 Details
US2213744A Splicing apparatus Expired / Lapsed 1938-05-24 1940-09-03 0 Details
US2213734A Photographic copying apparatus Expired / Lapsed 1938-05-18 1940-09-03 0 Details
US2210886A Safety control for square cutters Expired / Lapsed 1938-03-04 1940-08-13 0 Details
US2204608A Subbing photographic film Expired / Lapsed 1938-12-30 1940-06-18 0 Details
US2204147A Photographic stencil material Expired / Lapsed 1938-01-22 1940-06-11 0 Details
US2200001A Film casting machine Expired / Lapsed 1938-03-04 1940-05-07 0 Details
US2196768A Enteric coating Expired / Lapsed 1938-03-11 1940-04-09 0 Details
US2196738A Motion picture apparatus Expired / Lapsed 1938-01-21 1940-04-09 0 Details
US2186611A Photographic apparatus Expired / Lapsed 1938-07-14 1940-01-09 0 Details
US2186613A Photographic camera Expired / Lapsed 1937-12-22 1940-01-09 0 Details
US2186135A Continuous process for the manufacture of cellulose derivat… Expired / Lapsed 1936-12-03 1940-01-09 0 Details
US2184018A Lens attachment Expired / Lapsed 1937-09-23 1939-12-19 0 Details
US2183522A Antifriction support for a film holder and a driving clutch… Expired / Lapsed 1937-09-23 1939-12-19 0 Details
US2183520A Film forming process and product Expired / Lapsed 1936-02-15 1939-12-19 0 Details
US2177633A Method and apparatus for making thermoplastic sheeting Expired / Lapsed 1937-02-25 1939-10-31 0 Details
US2177660A Method and apparatus for making improved thermoplastic shee… Expired / Lapsed 1937-02-25 1939-10-31 0 Details
US2177659A Method for improving thermoplastic sheeting Expired / Lapsed 1937-02-25 1939-10-31 0 Details
US2177658A Method for feeding thermoplastic materials Expired / Lapsed 1937-02-25 1939-10-31 0 Details
US2172337A Two part roll holding camera Expired / Lapsed 1937-07-13 1939-09-05 0 Details
US2170009A Preparation of cellulose ethers Expired / Lapsed 1937-02-12 1939-08-22 0 Details
US2168987A Film feeding mechanism Expired / Lapsed 1937-06-24 1939-08-08 0 Details
US2168988A Adjustable tripod head Expired / Lapsed 1936-06-09 1939-08-08 0 Details
US2165414A Cable release for time exposures Expired / Lapsed 1937-12-08 1939-07-11 0 Details
US2165418A Reversing arrangement for document reproducing machines Expired / Lapsed 1937-08-04 1939-07-11 0 Details
US2165362A Driving mechanism for motion picture apparatus Expired / Lapsed 1937-04-17 1939-07-11 0 Details
US2165341A Photographic objective Expired / Lapsed 1936-07-28 1939-07-11 0 Details
US2160907A Filter for ultra-violet light Expired / Lapsed 1936-03-31 1939-06-06 0 Details
US2158202A Lens system Expired / Lapsed 1937-11-19 1939-05-16 0 Details
US2158193A Sound reproduction Expired / Lapsed 1937-09-30 1939-05-16 0 Details
US2153198A Range and view finder system for cameras Expired / Lapsed 1936-08-01 1939-04-04 0 Details
US2153220A Ejector for motion picture apparatus of the magazine type Expired / Lapsed 1935-01-11 1939-04-04 0 Details
US2151476A Molding method Expired / Lapsed 1936-03-23 1939-03-21 0 Details
US2150678A Condenser Expired / Lapsed 1936-09-09 1939-03-14 0 Details
US2147415A Electroplating Expired / Lapsed 1937-05-11 1939-02-14 0 Details
US2143769A Closure means for a film magazine and arrangement for opera… Expired / Lapsed 1936-05-16 1939-01-10 0 Details
US2136357A Carrying case Expired / Lapsed 1937-05-07 1938-11-08 0 Details
US2131747A Antihalation backing for photographic film Expired / Lapsed 1937-10-13 1938-10-04 0 Details
US2129449A Flowable composition comprising a polyvinyl formaldehyde ac… Expired / Lapsed 1935-06-28 1938-09-06 0 Details
US2129242A Heat sensitive compositions Expired / Lapsed 1935-05-25 1938-09-06 0 Details
US2129456A Composite cellulose derivative sheeting Expired / Lapsed 1934-10-04 1938-09-06 0 Details
US2127621A Photographic emulsions Expired / Lapsed 1936-04-16 1938-08-23 0 Details
US2127573A Photographic emulsions Expired / Lapsed 1936-04-16 1938-08-23 0 Details
US2127340A Photographic emulsion containing supersensitized thiazoloca… Expired / Lapsed 1937-03-29 1938-08-16 0 Details
US2126324A Roll holding camera Expired / Lapsed 1937-10-13 1938-08-09 0 Details
US2126299A Clutch connection for motion picture apparatus of the magaz… Expired / Lapsed 1936-04-24 1938-08-09 0 Details
US2124883A Indicating system for motion picture apparatus Expired / Lapsed 1935-06-11 1938-07-26 0 Details
US2117797A Photographic paper punching machine Expired / Lapsed 1937-06-17 1938-05-17 0 Details
US2117802A Distillation process Expired / Lapsed 1936-04-18 1938-05-17 0 Details
US2110477A Lens mount construction Expired / Lapsed 1936-02-04 1938-03-08 0 Details
US2108503A Coloring materials Expired / Lapsed 1935-06-19 1938-02-15 0 Details
US2101877A Process for preparing photographic gelatin Expired / Lapsed 1935-09-06 1937-12-14 0 Details
US2099297A Photographic material and process Expired / Lapsed 1936-06-23 1937-11-16 0 Details
US2098228A Artificial silk Expired / Lapsed 1934-06-22 1937-11-09 0 Details
US2095839A Photothermographic composition Expired / Lapsed 1935-09-27 1937-10-12 0 Details
US2095831A Film driving apparatus Expired / Lapsed 1935-07-06 1937-10-12 0 Details
US2090017A Stereocamera Expired / Lapsed 1936-11-13 1937-08-17 0 Details
US2083646A Motor drive for motion picture cameras Expired / Lapsed 1934-07-03 1937-06-15 0 Details
US2083628A Method of making vinyl derivative articles Expired / Lapsed 1934-01-10 1937-06-15 0 Details
US2080055A Photometric apparatus Expired / Lapsed 1935-07-06 1937-05-11 0 Details
US2080021A Motion picture apparatus control mechanism Expired / Lapsed 1935-02-16 1937-05-11 0 Details
US2080066A Film preserving package Expired / Lapsed 1933-10-31 1937-05-11 0 Details
US2077298A Process for the extraction of halogen from fluids Expired / Lapsed 1935-03-16 1937-04-13 0 Details
US2076190A Projection objective Expired / Lapsed 1934-09-26 1937-04-06 0 Details
US2063312A Printing machine lamp house Expired / Lapsed 1935-04-02 1936-12-08 0 Details
US2058532A Exposure control for cameras Expired / Lapsed 1934-09-18 1936-10-27 0 Details
US2058531A Camera diaphragm control Expired / Lapsed 1934-02-08 1936-10-27 0 Details
US2051201A Film making machine and method Expired / Lapsed 1934-04-10 1936-08-18 0 Details
US2042443A Adjustable supporting pillar or the like Expired / Lapsed 1936-03-13 1936-05-26 0 Details
US2039708A Coloring of cellulosic solutions Expired / Lapsed 1932-10-22 1936-05-05 0 Details
US2036447A Light regulating means Expired / Lapsed 1929-01-19 1936-04-07 0 Details
US2029930A Cam follower for a strip advancing mechanism Expired / Lapsed 1934-11-30 1936-02-04 0 Details
US2019737A Sensitive photographic material Expired / Lapsed 1934-05-18 1935-11-05 0 Details
US2019921A Process for stabilizing cellulose esters Expired / Lapsed 1933-06-13 1935-11-05 0 Details
US2008982A Device for producing enlarged images Expired / Lapsed 1934-02-01 1935-07-23 0 Details
US2006362A Colloidizing of the mixed esters of cellulose with the alky… Expired / Lapsed 1931-07-17 1935-07-02 0 Details
US2000042A Compressed foam gelatin Expired / Lapsed 1933-03-23 1935-05-07 0 Details
US2000589A Exposure control apparatus Expired / Lapsed 1931-08-10 1935-05-07 0 Details
US1997337A Cellulose higher acyl radical lacquers Expired / Lapsed 1930-12-11 1935-04-09 0 Details
US1991107A Cellulose acetate-carbamate Expired / Lapsed 1932-04-27 1935-02-12 0 Details
US1991152A Mechanical bolometer Expired / Lapsed 1931-11-06 1935-02-12 0 Details
US1976355A Speed control for bands Expired / Lapsed 1930-02-15 1934-10-09 0 Details
US1973470A Photographic printing apparatus Expired / Lapsed 1931-05-11 1934-09-11 0 Details
US1973468A Method and means for photographic printing Expired / Lapsed 1931-05-08 1934-09-11 0 Details
US1973469A Automatic control for photographic printing exposures Expired / Lapsed 1931-04-23 1934-09-11 0 Details
US1969465A Means for maintaining moving bands in synchronism Expired / Lapsed 1932-07-29 1934-08-07 0 Details
US1966313A Photographic camera shutter retard Expired / Lapsed 1933-10-21 1934-07-10 0 Details
US1966330A Process for making two-color subtractive photographic print… Expired / Lapsed 1931-07-22 1934-07-10 0 Details
US1962327A Process of stabilizing cellulose nitrate Expired / Lapsed 1932-10-04 1934-06-12 0 Details
US1954338A Apparatus for photographic printing Expired / Lapsed 1929-06-19 1934-04-10 0 Details
US1946604A Film winding device for motion picture apparatus Expired / Lapsed 1929-05-09 1934-02-13 0 Details
US1939232A Chemigraphic materials Expired / Lapsed 1932-07-13 1933-12-12 0 Details
US1939243A Photographic printing apparatus Expired / Lapsed 1931-01-23 1933-12-12 0 Details
US1939235A Process of making cellulose acetate Expired / Lapsed 1928-12-22 1933-12-12 0 Details
US1933831A Photographic printing apparatus Expired / Lapsed 1932-07-29 1933-11-07 0 Details
US1933804A Regeneration of photographic developers Expired / Lapsed 1932-01-20 1933-11-07 0 Details
US1933803A Hygrometer Expired / Lapsed 1929-01-03 1933-11-07 0 Details
US1930137A Apparatus for varying illumination Expired / Lapsed 1930-02-25 1933-10-10 0 Details
US1925567A Photographic shutter Expired / Lapsed 1932-11-04 1933-09-05 0 Details
US1925557A Photographic developer with alkali substitute Expired / Lapsed 1932-02-02 1933-09-05 0 Details
US1925546A X-ray intensifying screen Expired / Lapsed 1931-10-27 1933-09-05 0 Details
US1925509A Method of packaging Expired / Lapsed 1931-10-12 1933-09-05 0 Details
US1917370A Duplicating process Expired / Lapsed 1932-07-13 1933-07-11 0 Details
US1917379A Automatic gloss meter Expired / Lapsed 1928-08-02 1933-07-11 0 Details
US1908610A Automatic control for photographic printing exposures Expired / Lapsed 1927-03-30 1933-05-09 0 Details
US1900878A Document photographing apparatus Expired / Lapsed 1927-12-03 1933-03-07 0 Details
US1897843A Light sensitive tropochromic coating Expired / Lapsed 1930-08-07 1933-02-14 0 Details
US1880503A Ultra-violet sensitive layer Expired / Lapsed 1931-05-12 1932-10-04 0 Details
US1880414A Illuminating system for photographic apparatus Expired / Lapsed 1930-01-03 1932-10-04 0 Details
US1880808A Process of making cellulose esters of carboxylic acids Expired / Lapsed 1927-03-28 1932-10-04 0 Details
US1878967A Optical system for projection of color pictures Expired / Lapsed 1929-07-01 1932-09-20 0 Details
US1866718A Method and apparatus for focusing lenses Expired / Lapsed 1930-05-14 1932-07-12 0 Details
US1866712A Method of making combined sound and picture records Expired / Lapsed 1930-02-05 1932-07-12 0 Details
US1861918A Process of conditioning photographic films Expired / Lapsed 1928-01-30 1932-06-07 0 Details
US1857523A Film holding strap Expired / Lapsed 1929-09-03 1932-05-10 0 Details
US1846230A Photographic film Expired / Lapsed 1930-12-11 1932-02-23 0 Details
US1844716A Process of making photographic emulsions Expired / Lapsed 1929-04-19 1932-02-09 0 Details
US1836691A Means for maintaining moving bands in synchronism Expired / Lapsed 1929-09-03 1931-12-15 0 Details
US1831796A Method and apparatus for reproducing photographic sound rec… Expired / Lapsed 1930-03-21 1931-11-10 0 Details
US1831790A Roll film photographic camera and the like Expired / Lapsed 1930-03-19 1931-11-10 0 Details
US1826664A Indicating device for document photographing apparatus Expired / Lapsed 1929-05-23 1931-10-06 0 Details
US1826299A Photographic camera Expired / Lapsed 1929-01-22 1931-10-06 0 Details
US1799879A Multiple-opening diaphragm for photographic cameras Expired / Lapsed 1929-07-18 1931-04-07 0 Details
US1787808A Optical system for photographic apparatus Expired / Lapsed 1928-09-04 1931-01-06 0 Details
US1763990A Photographic light-sensitive material and process for makin… Expired / Lapsed 1929-02-25 1930-06-17 0 Details
US1763630A Photographic printer Expired / Lapsed 1928-04-03 1930-06-10 0 Details
US1762932A Projection system for color pictures Expired / Lapsed 1927-05-11 1930-06-10 0 Details
US1762934A Combined humidifier and projector Expired / Lapsed 1927-02-10 1930-06-10 0 Details
US1763208A Light system for photographic-printing machines Expired / Lapsed 1926-12-17 1930-06-10 0 Details
US1742811A Photographic-printer vignetting apparatus Expired / Lapsed 1926-12-10 1930-01-07 0 Details
US1701121A Photographic shutter Expired / Lapsed 1924-10-01 1929-02-05 0 Details
US1690602A Optical instrument Expired / Lapsed 1924-06-27 1928-11-06 0 Details
US1688441A Lens-attachment mount for photographic apparatus Expired / Lapsed 1928-01-17 1928-10-23 0 Details
US1661757A Mobile color projector Expired / Lapsed 1924-12-19 1928-03-06 0 Details
US1651733A Nondusting carbon pigment and process of making the same Expired / Lapsed 1926-11-26 1927-12-06 0 Details
US1627892A Lens Expired / Lapsed 1922-06-05 1927-05-10 0 Details
US1613363A Light-modifying device for cameras Expired / Lapsed 1924-04-09 1927-01-04 0 Details
US1610205A Battery-charging apparatus Expired / Lapsed 1923-11-05 1926-12-07 0 Details
US1602589A Photographic emulsion with mercury compound and process of … Expired / Lapsed 1925-11-04 1926-10-12 0 Details
US1589327A Electrodeposition of coatings of cellulosic compounds Expired / Lapsed 1925-04-07 1926-06-15 0 Details
US1560579A Suction conveyer for sheet material Expired / Lapsed 1923-11-23 1925-11-10 0 Details
US1548960A Motion-picture apparatus Expired / Lapsed 1925-01-17 1925-08-11 0 Details
US1540862A Photographic film and process of making the same Expired / Lapsed 1923-01-12 1925-06-09 0 Details
US1536341A Dental x-ray-film package Expired / Lapsed 1920-07-14 1925-05-05 0 Details
US1507212A Lens Expired / Lapsed 1920-11-29 1924-09-02 0 Details
US1486226A Motion-picture apparatus Expired / Lapsed 1922-07-17 1924-03-11 0 Details
US1454850A Method of and apparatus for distant regulation of cinematog… Expired / Lapsed 1920-03-29 1923-05-15 0 Details
US1454818A Photographic cartridge Expired / Lapsed 1921-07-25 1923-05-08 0 Details
US1405491A Cellulose-ether composition Expired / Lapsed 1921-02-25 1922-02-07 0 Details
US1260356A Film-camera. Expired / Lapsed 1915-10-25 1918-03-26 0 Details
US1139023A Photographic exposing mechanism. Expired / Lapsed 1913-10-30 1915-05-11 0 Details
US1112525A Tripod-socket for camera-beds. Expired / Lapsed 1913-05-05 1914-10-06 0 Details
US1007322A Tripod. Expired / Lapsed 1910-06-14 1911-10-31 0 Details
US932381A Photographic shutter. Expired / Lapsed 1907-01-24 1909-08-24 0 Details