IG Farbenindustrie AG
IG FarbeniActive Patents
0
Total Holdings
237
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB508802A | Improvements in the photoelectric determination of the colo… | Expired / Lapsed | 1938-01-05 | — | 0 | Details |
| GB505200A | Improvements in sizing paper | Expired / Lapsed | 1937-11-06 | — | 0 | Details |
| GB500298A | Improvements in the manufacture and production of plastic m… | Expired / Lapsed | 1937-08-09 | — | 0 | Details |
| GB497689A | A process for improving the properties of thermoplastic, fi… | Expired / Lapsed | 1937-07-26 | — | 0 | Details |
| GB495830A | Method of treating textile fibrous materials | Expired / Lapsed | 1937-05-18 | — | 0 | Details |
| GB495067A | Improvements in or relating to injection syringes | Expired / Lapsed | 1937-05-07 | — | 0 | Details |
| GB493288A | Manufacture of substitutes for wool from viscose | Expired / Lapsed | 1937-04-02 | — | 0 | Details |
| GB492956A | Improvements relating to filters | Expired / Lapsed | 1937-02-26 | — | 0 | Details |
| GB488997A | Manufacture of plastic masses and shaped articles therefrom | Expired / Lapsed | 1937-01-15 | — | 0 | Details |
| GB486878A | Process for the manufacture of rubber conversion products | Expired / Lapsed | 1936-12-10 | — | 0 | Details |
| GB482897A | Nitrogenous synthetic resins | Expired / Lapsed | 1936-10-08 | — | 0 | Details |
| GB475671A | Improvements in the manufacture and production of polymeris… | Expired / Lapsed | 1936-06-16 | — | 0 | Details |
| GB477889A | Improvements in water-proofing textile materials | Expired / Lapsed | 1936-06-05 | — | 0 | Details |
| GB466023A | Improvements in the manufacture and production of sound rec… | Expired / Lapsed | 1935-11-18 | — | 0 | Details |
| GB465520A | Manufacture of polymerisation products | Expired / Lapsed | 1935-10-03 | — | 0 | Details |
| GB461328A | Improvements in washing and cleansing | Expired / Lapsed | 1935-08-14 | — | 0 | Details |
| GB458781A | Process for the aftertreatment of condensation products con… | Expired / Lapsed | 1935-06-26 | — | 0 | Details |
| GB456142A | Improvements relating to assistants for use in the textile,… | Expired / Lapsed | 1935-05-03 | — | 0 | Details |
| GB459039A | Manufacture of washing agents and detergents | Expired / Lapsed | 1935-03-25 | — | 0 | Details |
| GB450467A | The manufacture of condensation products of totally hydroli… | Expired / Lapsed | 1935-01-17 | — | 0 | Details |
| GB452649A | Process of washing or cleansing textile materials | Expired / Lapsed | 1934-11-23 | — | 0 | Details |
| GB435481A | The manufacture of wetting and like agents for textile and … | Expired / Lapsed | 1934-03-23 | — | 0 | Details |
| GB435557A | Improvements in insulating electrical conductors | Expired / Lapsed | 1934-03-21 | — | 0 | Details |
| GB423823A | Improvements in the manufacture of pulverulent metal alloys | Expired / Lapsed | 1934-01-13 | — | 0 | Details |
| GB428941A | Process of protecting medicaments from the action of stomac… | Expired / Lapsed | 1933-11-22 | — | 0 | Details |
| GB418469A | Improvements in the manufacture and production of polymeris… | Expired / Lapsed | 1933-11-13 | — | 0 | Details |
| GB419826A | Improvements in the manufacture and production of films, th… | Expired / Lapsed | 1933-05-18 | — | 0 | Details |
| GB389434A | Improvements in and relating to cinematograph sound films | Expired / Lapsed | 1932-12-10 | — | 0 | Details |
| GB387956A | Improvements in or relating to the manufacture of new dyest… | Expired / Lapsed | 1932-09-12 | — | 0 | Details |
| GB406700A | Improvements in the manufacture and production of aliphatic… | Expired / Lapsed | 1932-09-01 | — | 0 | Details |
| GB364089A | Improvements in the manufacture and production of polymeris… | Expired / Lapsed | 1930-08-21 | — | 0 | Details |
| GB349587A | Improvements in the manufacture and production of alloys fr… | Expired / Lapsed | 1929-12-23 | — | 0 | Details |
| GB301807A | Manufacture of waterproof paper or pasteboard | Expired / Lapsed | 1928-12-05 | — | 0 | Details |
| GB310625A | Improvements in the production and application of plates fo… | Expired / Lapsed | 1928-03-22 | — | 0 | Details |
| GB317770A | Improvements in the manufacture of etherified polyhydric al… | Expired / Lapsed | 1928-03-19 | — | 0 | Details |
| GB301975A | Improvements in the low-temperature carbonisation of fuels … | Expired / Lapsed | 1927-09-19 | — | 0 | Details |
| GB296751A | Improved process and means for the production of gases | Expired / Lapsed | 1927-04-02 | — | 0 | Details |
| FR55581E | Process for the production of rubber processing products | Expired / Lapsed | 1942-09-24 | 1952-09-01 | 0 | Details |
| FR906181A | Process for preparing heterocyclic compounds | Expired / Lapsed | 1944-07-31 | 1945-12-26 | 0 | Details |
| FR897067A | Process for manufacturing polycondensation products compris… | Expired / Lapsed | 1943-08-09 | 1945-03-12 | 0 | Details |
| FR892107A | Manufacturing process of polyurethane compounds | Expired / Lapsed | 1943-03-11 | 1944-03-29 | 0 | Details |
| DE745029C | Process for the production of higher molecular weight super… | Expired / Lapsed | 1939-09-27 | 1944-02-23 | 0 | Details |
| FR889373A | Washing, fulling and cleaning agents | Expired / Lapsed | 1942-12-23 | 1944-01-07 | 0 | Details |
| FR883764A | Method of shaping highly polymerized rectilinear formula bo… | Expired / Lapsed | 1942-07-03 | 1943-07-16 | 0 | Details |
| FR881981A | Process for preparing high molecular weight products | Expired / Lapsed | 1942-05-11 | 1943-05-13 | 0 | Details |
| FR879995A | Process for the constitution of positive photographic images | Expired / Lapsed | 1942-03-05 | 1943-03-10 | 0 | Details |
| DE731981C | Process for the production of condensation products | Expired / Lapsed | 1940-07-05 | 1943-02-18 | 0 | Details |
| FR875608A | Process for treating fluorine-containing aluminum manufactu… | Expired / Lapsed | 1941-09-20 | 1942-09-29 | 0 | Details |
| US2288717A | Method for the investigation of substances with the aid of … | Expired / Lapsed | 1940-01-31 | 1942-07-07 | 0 | Details |
| US2288718A | Device for measuring the intensity of a radiation of slow n… | Expired / Lapsed | 1940-01-31 | 1942-07-07 | 0 | Details |
| FR871893A | Mixed resins and their preparation process | Expired / Lapsed | 1941-05-03 | 1942-05-20 | 0 | Details |
| FR870599A | Process for preparing transparent artificial materials base… | Expired / Lapsed | 1941-03-06 | 1942-03-16 | 0 | Details |
| US2274900A | Method of investigating substances | Expired / Lapsed | 1939-10-06 | 1942-03-03 | 0 | Details |
| US2272375A | Arrangement for reproducing the intensity distribution in a… | Expired / Lapsed | 1940-08-02 | 1942-02-10 | 0 | Details |
| US2272374A | Device for generating a beam of ions | Expired / Lapsed | 1940-05-20 | 1942-02-10 | 0 | Details |
| FR869243A | Process for the preparation of polyesters containing amide … | Expired / Lapsed | 1941-01-15 | 1942-01-27 | 0 | Details |
| US2270959A | Stabilization of synthetic rubberlike materials | Expired / Lapsed | 1939-09-27 | 1942-01-27 | 0 | Details |
| US2270373A | Neutron image converter | Expired / Lapsed | 1940-05-20 | 1942-01-20 | 0 | Details |
| US2267753A | Process of preparing platinum alloy catalysts for gas react… | Expired / Lapsed | 1939-01-06 | 1941-12-30 | 0 | Details |
| US2265450A | Polymeric n-vinyl lactams and process of producing same | Expired / Lapsed | 1940-05-28 | 1941-12-09 | 0 | Details |
| DE711408C | Process for the preparation of nitrogen-containing products… | Expired / Lapsed | 1935-08-17 | 1941-10-01 | 0 | Details |
| US2246264A | Condensation products from polycarboxylic acids | Expired / Lapsed | 1937-10-19 | 1941-06-17 | 0 | Details |
| US2241321A | Preparation of polyamides | Expired / Lapsed | 1938-07-20 | 1941-05-06 | 0 | Details |
| US2232030A | Device for the generation of large amounts of negative ions | Expired / Lapsed | 1939-02-06 | 1941-02-18 | 0 | Details |
| US2231836A | Process of producing sound records | Expired / Lapsed | 1938-01-11 | 1941-02-11 | 0 | Details |
| US2228332A | Coating objects with artificial materials | Expired / Lapsed | 1938-03-22 | 1941-01-14 | 0 | Details |
| US2227637A | Impregnating and insulating material | Expired / Lapsed | 1939-05-24 | 1941-01-07 | 0 | Details |
| US2228159A | Manufacture of cation-exchanging bodies | Expired / Lapsed | 1937-07-09 | 1941-01-07 | 0 | Details |
| US2223930A | Amine resins | Expired / Lapsed | 1937-11-04 | 1940-12-03 | 0 | Details |
| US2219033A | Method and device for generating a beam of ions of high vel… | Expired / Lapsed | 1938-10-11 | 1940-10-22 | 0 | Details |
| US2213125A | Manufacture of materials resembling crepe | Expired / Lapsed | 1936-09-15 | 1940-08-27 | 0 | Details |
| US2211710A | Diazine-aldehyde resinous condensation products | Expired / Lapsed | 1938-09-24 | 1940-08-13 | 0 | Details |
| US2210442A | Capillary active compounds and process of preparing them | Expired / Lapsed | 1938-12-15 | 1940-08-06 | 0 | Details |
| US2204619A | Production of shaped catalysts | Expired / Lapsed | 1937-12-07 | 1940-06-18 | 0 | Details |
| US2204539A | Process of effecting cation exchange | Expired / Lapsed | 1938-06-21 | 1940-06-11 | 0 | Details |
| US2202233A | Stability of luminous paints | Expired / Lapsed | 1938-07-06 | 1940-05-28 | 0 | Details |
| US2200478A | Manufacture of antimony trioxide pigments | Expired / Lapsed | 1939-02-02 | 1940-05-14 | 0 | Details |
| US2199780A | Imidazolines containing sulphuric acid radicals and process… | Expired / Lapsed | 1939-05-04 | 1940-05-07 | 0 | Details |
| US2197768A | Polymerized hydrocarbon composition | Expired / Lapsed | 1933-01-14 | 1940-04-23 | 0 | Details |
| US2195974A | Process of producing new amino-carboxylic acids | Expired / Lapsed | 1937-07-10 | 1940-04-02 | 0 | Details |
| US2195196A | Method of diminishing the swelling of cation-exchanging res… | Expired / Lapsed | 1938-07-07 | 1940-03-26 | 0 | Details |
| US2193327A | Artificial resins | Expired / Lapsed | 1938-04-06 | 1940-03-12 | 0 | Details |
| US2191295A | Bituminous materials | Expired / Lapsed | 1936-11-27 | 1940-02-20 | 0 | Details |
| US2190265A | Spinning artificial threads | Expired / Lapsed | 1937-01-02 | 1940-02-13 | 0 | Details |
| US2188778A | Production of polymerization products of vinyl ethers | Expired / Lapsed | 1937-02-25 | 1940-01-30 | 0 | Details |
| US2188115A | Investigation of materials with neutrons | Expired / Lapsed | 1938-03-24 | 1940-01-23 | 0 | Details |
| US2187818A | Dialyzing apparatus | Expired / Lapsed | 1937-04-13 | 1940-01-23 | 0 | Details |
| US2187817A | Interpolymerization products of vinyl chloride and esters o… | Expired / Lapsed | 1936-12-05 | 1940-01-23 | 0 | Details |
| US2187823A | Condensation products of ethers of alkylol amines | Expired / Lapsed | 1931-03-26 | 1940-01-23 | 0 | Details |
| US2187567A | Crimping device | Expired / Lapsed | 1939-04-01 | 1940-01-16 | 0 | Details |
| US2186757A | Photographic detection of slowly moving neutrons | Expired / Lapsed | 1938-03-24 | 1940-01-09 | 0 | Details |
| US2185789A | Thread and fiber of organic thermoplastic materials and pro… | Expired / Lapsed | 1937-06-26 | 1940-01-02 | 0 | Details |
| US2185163A | Polyoxyalkylene ammonium compounds and process of preparing… | Expired / Lapsed | 1936-07-21 | 1939-12-26 | 0 | Details |
| US2183226A | Sizing of textile materials | Expired / Lapsed | 1937-01-11 | 1939-12-12 | 0 | Details |
| US2182178A | Derivative of substituted succinic acids | Expired / Lapsed | 1937-03-20 | 1939-12-05 | 0 | Details |
| US2182306A | Polymerization of ethylene imines | Expired / Lapsed | 1936-04-24 | 1939-12-05 | 0 | Details |
| FR849126A | Process for the production of polymerization products of vi… | Expired / Lapsed | 1939-01-19 | 1939-11-14 | 0 | Details |
| US2180082A | Polymerization products from butadiene or its substitution … | Expired / Lapsed | 1938-01-07 | 1939-11-14 | 0 | Details |
| US2178523A | Production of high molecular hydroxylated condensation prod… | Expired / Lapsed | 1937-10-16 | 1939-10-31 | 0 | Details |
| US2176441A | Removal of gaseous weak acid from gases containing the same | Expired / Lapsed | 1936-03-31 | 1939-10-17 | 0 | Details |
| US2174762A | Condensation products derived from amines and method of pro… | Expired / Lapsed | 1939-02-15 | 1939-10-03 | 0 | Details |
| US2174760A | Condensation products derived from carboxylic acids and met… | Expired / Lapsed | 1935-04-13 | 1939-10-03 | 0 | Details |
| US2172403A | Process for producing polymers of isobutylene | Expired / Lapsed | 1935-03-29 | 1939-09-12 | 0 | Details |
| US2171439A | Process for the production of reguline beryllium and beryll… | Expired / Lapsed | 1937-11-13 | 1939-08-29 | 0 | Details |
| US2168535A | Textile material and a process of preparing it | Expired / Lapsed | 1938-11-12 | 1939-08-08 | 0 | Details |
| FR843845A | Polymerization process | Expired / Lapsed | 1938-09-23 | 1939-07-11 | 0 | Details |
| US2163176A | Process for making organic sulphides | Expired / Lapsed | 1935-11-08 | 1939-06-20 | 0 | Details |
| US2160375A | Water-repellent textile material and process of manufacturi… | Expired / Lapsed | 1936-12-31 | 1939-05-30 | 0 | Details |
| DE676117C | Process for the production of high molecular weight polyami… | Expired / Lapsed | 1934-12-11 | 1939-05-26 | 0 | Details |
| DE676059C | Magnesium wire sewing material for surgical purposes | Expired / Lapsed | 1935-10-17 | 1939-05-24 | 0 | Details |
| US2159231A | Producing nickel alloy articles | Expired / Lapsed | 1936-05-21 | 1939-05-23 | 0 | Details |
| US2159140A | Production of hydrocarbons from carbon monoxide and hydrogen | Expired / Lapsed | 1936-03-05 | 1939-05-23 | 0 | Details |
| DE675837C | Dentifrices | Expired / Lapsed | 1932-06-12 | 1939-05-22 | 0 | Details |
| US2157348A | Production of aliphatic vinyl ethers by means of acetylene | Expired / Lapsed | 1937-09-18 | 1939-05-09 | 0 | Details |
| US2157697A | Manufacture of plastic masses | Expired / Lapsed | 1936-05-23 | 1939-05-09 | 0 | Details |
| US2156455A | Manufacture of felt | Expired / Lapsed | 1936-05-23 | 1939-05-02 | 0 | Details |
| US2155877A | Process for the manufacture of imidazolines containing at l… | Expired / Lapsed | 1936-08-03 | 1939-04-25 | 0 | Details |
| US2153031A | Process of producing crimped artificial fibers from cupramm… | Expired / Lapsed | 1937-07-10 | 1939-04-04 | 0 | Details |
| FR838995A | Process for the separation of crude oil emulsions | Expired / Lapsed | 1938-06-08 | 1939-03-21 | 0 | Details |
| DE672888C | Device for reversing negatives by electrical means in order… | Expired / Lapsed | 1937-11-30 | 1939-03-11 | 0 | Details |
| FR837555A | Method and device for the production of artificial fibers | Expired / Lapsed | 1938-05-05 | 1939-02-14 | 0 | Details |
| US2144649A | Process of printing lenticular film and lenticular film the… | Expired / Lapsed | 1936-05-08 | 1939-01-24 | 0 | Details |
| US2144202A | Saponifying cellulose esters | Expired / Lapsed | 1935-04-19 | 1939-01-17 | 0 | Details |
| FR835847A | Process for the production of plates and molded bodies of f… | Expired / Lapsed | 1938-03-28 | 1939-01-04 | 0 | Details |
| US2142475A | Device for cutting endless bands of artificial fibers | Expired / Lapsed | 1934-11-20 | 1939-01-03 | 0 | Details |
| US2140921A | Manufacture of solutions of a polymerized vinyl compound | Expired / Lapsed | 1935-12-06 | 1938-12-20 | 0 | Details |
| US2140048A | Production of polymerization products | Expired / Lapsed | 1937-05-04 | 1938-12-13 | 0 | Details |
| US2136928A | Manufacture of amines of high molecular weight, which are r… | Expired / Lapsed | 1935-12-09 | 1938-11-15 | 0 | Details |
| US2132361A | Process of chlorinating methylaromatic compounds | Expired / Lapsed | 1935-11-26 | 1938-10-04 | 0 | Details |
| US2131120A | Manufacture of organic compounds containing basic substitue… | Expired / Lapsed | 1935-10-31 | 1938-09-27 | 0 | Details |
| US2131145A | Process for increasing the reactivity of naturally or artif… | Expired / Lapsed | 1935-09-12 | 1938-09-27 | 0 | Details |
| DE662281C | Process for the production of diolefin polymers | Expired / Lapsed | 1932-11-26 | 1938-07-09 | 0 | Details |
| US2122805A | Production of thermoplastic polymerization products | Expired / Lapsed | 1936-06-03 | 1938-07-05 | 0 | Details |
| US2111820A | Alkyl aromatic acetic acid and homologues thereof | Expired / Lapsed | 1935-12-09 | 1938-03-22 | 0 | Details |
| US2110833A | Production of styrenes | Expired / Lapsed | 1930-07-18 | 1938-03-08 | 0 | Details |
| FR823608A | Electric batteries | Expired / Lapsed | 1937-06-26 | 1938-01-24 | 0 | Details |
| US2106111A | Manufacture of alkali cellulose | Expired / Lapsed | 1935-02-05 | 1938-01-18 | 0 | Details |
| US2103872A | Higr molecular nitrogenous organic compounds containing car… | Expired / Lapsed | 1934-12-08 | 1937-12-28 | 0 | Details |
| US2104000A | Production of polymerization products from vinyl ethers | Expired / Lapsed | 1931-11-09 | 1937-12-28 | 0 | Details |
| FR821344A | Diamino-sulfones of the anthraquinone series, process for p… | Expired / Lapsed | 1937-04-30 | 1937-12-02 | 0 | Details |
| US2100900A | Production of interpolymerization products | Expired / Lapsed | 1935-12-07 | 1937-11-30 | 0 | Details |
| FR819962A | Products with capillary action and method of preparation th… | Expired / Lapsed | 1937-03-30 | 1937-10-29 | 0 | Details |
| US2097120A | Manufacture of nitrogenous cellulose derivatives | Expired / Lapsed | 1935-08-08 | 1937-10-26 | 0 | Details |
| US2093140A | Manufacture of artificial silk | Expired / Lapsed | 1933-02-24 | 1937-09-14 | 0 | Details |
| FR816448A | Manufacturing process of synthetic base exchange resins | Expired / Lapsed | 1937-01-18 | 1937-08-07 | 0 | Details |
| US2088085A | Production of stable and efficient foam | Expired / Lapsed | 1934-10-03 | 1937-07-27 | 0 | Details |
| US2085508A | Method and apparatus for recording the temperatures of hot … | Expired / Lapsed | 1935-04-22 | 1937-06-29 | 0 | Details |
| US2085129A | Production of colloidal metal hydroxides | Expired / Lapsed | 1934-07-10 | 1937-06-29 | 0 | Details |
| US2082814A | Process of making a substitute for wool from viscose | Expired / Lapsed | 1935-11-29 | 1937-06-08 | 0 | Details |
| FR813465A | Photoelectric posometer | Expired / Lapsed | 1936-11-13 | 1937-06-02 | 0 | Details |
| DE644759C | Process for coating drug forms with coatings resistant to g… | Expired / Lapsed | 1932-11-24 | 1937-05-12 | 0 | Details |
| FR811222A | Soft material with a sticky surface | Expired / Lapsed | 1936-09-23 | 1937-04-09 | 0 | Details |
| US2072465A | Production of polymeric nu-vinyl compounds | Expired / Lapsed | 1935-07-10 | 1937-03-02 | 0 | Details |
| US2069336A | Production of derivatives of polyhydric alcohols | Expired / Lapsed | 1933-03-18 | 1937-02-02 | 0 | Details |
| US2067706A | Artificial compositions | Expired / Lapsed | 1933-12-06 | 1937-01-12 | 0 | Details |
| FR806524A | Felt manufacturing process | Expired / Lapsed | 1936-05-15 | 1936-12-18 | 0 | Details |
| US2063596A | Thermal treatment of carbon compounds | Expired / Lapsed | 1933-02-13 | 1936-12-08 | 0 | Details |
| US2061934A | Rubber-like synthetic highmolecular masses | Expired / Lapsed | 1935-04-12 | 1936-11-24 | 0 | Details |
| US2061230A | Manufacture of gelatin reliefs for printing | Expired / Lapsed | 1934-08-18 | 1936-11-17 | 0 | Details |
| US2060410A | Synthetic resins | Expired / Lapsed | 1933-08-24 | 1936-11-10 | 0 | Details |
| DE638071C | Process for the production of polyaminocarboxylic acid nitr… | Expired / Lapsed | 1935-04-05 | 1936-11-09 | 0 | Details |
| US2056915A | Production of chrysene | Expired / Lapsed | 1933-10-04 | 1936-10-06 | 0 | Details |
| US2054903A | Polymerization product | Expired / Lapsed | 1933-10-31 | 1936-09-22 | 0 | Details |
| DE635522C | Detergents, wetting agents, dispersants and leveling agents | Expired / Lapsed | 1930-05-16 | 1936-09-18 | 0 | Details |
| US2054131A | Fibrous filling materials for stuffing purposes | Expired / Lapsed | 1934-02-10 | 1936-09-15 | 0 | Details |
| US2047398A | Artificial resins and process of making them | Expired / Lapsed | 1931-06-17 | 1936-07-14 | 0 | Details |
| US2039734A | New compositions of matter containing luminous substances | Expired / Lapsed | 1933-02-23 | 1936-05-05 | 0 | Details |
| FR797779A | Process for the manufacture of viscose fibers suitable as r… | Expired / Lapsed | 1935-11-16 | 1936-05-04 | 0 | Details |
| US2031929A | Impregnation of materials | Expired / Lapsed | 1932-07-29 | 1936-02-25 | 0 | Details |
| US2020633A | Device for equalizing fluctuations produced in masses deliv… | Expired / Lapsed | 1932-10-19 | 1935-11-12 | 0 | Details |
| US2019834A | Production of plywood and other joined wooden articles | Expired / Lapsed | 1930-07-11 | 1935-11-05 | 0 | Details |
| US2016490A | Production of mixed polymerization products from vinyl ethe… | Expired / Lapsed | 1931-11-09 | 1935-10-08 | 0 | Details |
| FR787819A | New washing and cleaning agents | Expired / Lapsed | 1935-03-25 | 1935-09-30 | 0 | Details |
| US2009657A | Esters of polymeric carbohydrates | Expired / Lapsed | 1931-05-19 | 1935-07-30 | 0 | Details |
| US2004243A | Method of and means for operating breathing apparatus | Expired / Lapsed | 1929-01-11 | 1935-06-11 | 0 | Details |
| US2002003A | Production of acetylene and carbon black | Expired / Lapsed | 1931-09-19 | 1935-05-21 | 0 | Details |
| US2000388A | Manufacture of ribbons | Expired / Lapsed | 1932-02-27 | 1935-05-07 | 0 | Details |
| US2000224A | Production of gaseous mixtures containing hydrogen | Expired / Lapsed | 1929-11-01 | 1935-05-07 | 0 | Details |
| US1996003A | Production of hydroxy-alkyl compounds | Expired / Lapsed | 1931-02-28 | 1935-03-26 | 0 | Details |
| US1993838A | Electrical insulation | Expired / Lapsed | 1928-09-01 | 1935-03-12 | 0 | Details |
| US1992615A | Amino nitrile and process of producing same | Expired / Lapsed | 1932-08-11 | 1935-02-26 | 0 | Details |
| US1988861A | Production of metallic plates suitable for use as accumulat… | Expired / Lapsed | 1930-02-18 | 1935-01-22 | 0 | Details |
| US1982774A | Mirror | Expired / Lapsed | 1930-04-21 | 1934-12-04 | 0 | Details |
| US1982985A | Process of preparing hydrogenated amines | Expired / Lapsed | 1929-02-12 | 1934-12-04 | 0 | Details |
| US1977155A | Carrying out chemical reactions between gas-like substances | Expired / Lapsed | 1930-07-26 | 1934-10-16 | 0 | Details |
| US1970578A | Assistants for the textile and related industries | Expired / Lapsed | 1931-11-24 | 1934-08-21 | 0 | Details |
| US1964629A | Vitreous composition | Expired / Lapsed | 1931-08-26 | 1934-06-26 | 0 | Details |
| US1959930A | Hydroxy-alkyl ethers of polyhydric alcohols and their produ… | Expired / Lapsed | 1931-05-13 | 1934-05-22 | 0 | Details |
| US1959185A | Production of adheshves | Expired / Lapsed | 1930-06-17 | 1934-05-15 | 0 | Details |
| US1952243A | Easily workable masses from phenolformaldehyde condensation… | Expired / Lapsed | 1929-01-03 | 1934-03-27 | 0 | Details |
| US1951712A | Process for improving fibrous materials | Expired / Lapsed | 1930-05-21 | 1934-03-20 | 0 | Details |
| US1941111A | Production of metal carbonyls | Expired / Lapsed | 1931-04-04 | 1933-12-26 | 0 | Details |
| US1940385A | Electrode for accumulators | Expired / Lapsed | 1931-07-11 | 1933-12-19 | 0 | Details |
| US1938730A | Rubber-like mass containing styrol polymerizates | Expired / Lapsed | 1930-07-10 | 1933-12-12 | 0 | Details |
| US1933962A | Preserving of rubber | Expired / Lapsed | 1931-12-31 | 1933-11-07 | 0 | Details |
| US1933052A | Production of polymerization products | Expired / Lapsed | 1931-05-19 | 1933-10-31 | 0 | Details |
| US1920403A | Process for producing polymerization products of vinyl hali… | Expired / Lapsed | 1931-08-04 | 1933-08-01 | 0 | Details |
| DE580366C | Process for the preparation of sulfuric acid derivatives of… | Expired / Lapsed | 1930-09-05 | 1933-07-13 | 0 | Details |
| DE580540C | Process to improve the quality of rubber-like polymerisatio… | Expired / Lapsed | 1928-01-29 | 1933-07-12 | 0 | Details |
| US1912856A | Separation of liquid constituents from mixtures of solids a… | Expired / Lapsed | 1930-08-21 | 1933-06-06 | 0 | Details |
| DE577258C | Process for the production of hormones regulating cell grow… | Expired / Lapsed | 1931-03-27 | 1933-05-27 | 0 | Details |
| US1906484A | Soap preparation | Expired / Lapsed | 1931-03-26 | 1933-05-02 | 0 | Details |
| US1902102A | Manufacture of viscose | Expired / Lapsed | 1929-11-27 | 1933-03-21 | 0 | Details |
| US1901044A | Production of artificial masses | Expired / Lapsed | 1929-05-04 | 1933-03-14 | 0 | Details |
| US1894467A | Production of foils and apparatus therefor | Expired / Lapsed | 1930-09-25 | 1933-01-17 | 0 | Details |
| US1891203A | Polymerization of unsaturated organic compounds | Expired / Lapsed | 1930-01-30 | 1932-12-13 | 0 | Details |
| US1889157A | Process of chlorinating hydrocarbons | Expired / Lapsed | 1929-10-18 | 1932-11-29 | 0 | Details |
| US1885451A | Process of preparing an active mass for cathodes of electri… | Expired / Lapsed | 1930-05-22 | 1932-11-01 | 0 | Details |
| US1880901A | Production of maleic acid and its anhydride | Expired / Lapsed | 1931-09-12 | 1932-10-04 | 0 | Details |
| US1876920A | Manufacture of carbohydrate derivatives | Expired / Lapsed | 1930-04-25 | 1932-09-13 | 0 | Details |
| US1874546A | Process for the coagulation of latex like emulsions to rubb… | Expired / Lapsed | 1929-01-04 | 1932-08-30 | 0 | Details |
| US1868921A | Production of carbon black | Expired / Lapsed | 1930-04-21 | 1932-07-26 | 0 | Details |
| US1864078A | Products of latex character and a process for producing the… | Expired / Lapsed | 1928-01-04 | 1932-06-21 | 0 | Details |
| US1863002A | Process for grinding etching plates made of magnesium alloy… | Expired / Lapsed | 1929-07-20 | 1932-06-14 | 0 | Details |
| US1850997A | Production of resistant silver surfaces | Expired / Lapsed | 1928-10-29 | 1932-03-29 | 0 | Details |
| US1850286A | Process for making finely divided metal oxides | Expired / Lapsed | 1926-09-18 | 1932-03-22 | 0 | Details |
| US1845835A | Measuring the intensity of ultraviolet rays | Expired / Lapsed | 1928-06-05 | 1932-02-16 | 0 | Details |
| FR718956A | Process for the production of high value liquid products fr… | Expired / Lapsed | 1931-06-22 | 1932-01-30 | 0 | Details |
| US1837614A | Acid-proof cementing compositions and process of preparing … | Expired / Lapsed | 1927-11-28 | 1931-12-22 | 0 | Details |
| US1834850A | Schiff's bases derived from alpha substituted cinnamylaldeh… | Expired / Lapsed | 1929-02-21 | 1931-12-01 | 0 | Details |
| US1834849A | Condensation product of alpha, beta disubstituted acroleins… | Expired / Lapsed | 1928-09-01 | 1931-12-01 | 0 | Details |
| US1828756A | Process for the refining of chromium ores | Expired / Lapsed | 1928-03-30 | 1931-10-27 | 0 | Details |
| DE535074C | Process for the preparation of nitrogenous derivatives of o… | Expired / Lapsed | 1929-04-24 | 1931-10-05 | 0 | Details |
| US1816388A | Method of producing finely divided metal oxides | Expired / Lapsed | 1925-05-20 | 1931-07-28 | 0 | Details |
| US1813514A | Production of carbon black and apparatus therefor | Expired / Lapsed | 1929-09-04 | 1931-07-07 | 0 | Details |
| DE526392C | Process for the production of metal complex compounds | Expired / Lapsed | 1928-11-02 | 1931-06-05 | 0 | Details |
| US1803475A | Apparatus for making bands of artificial fibers | Expired / Lapsed | 1928-02-18 | 1931-05-05 | 0 | Details |
| US1790249A | Electrode for electrolytic cells | Expired / Lapsed | 1928-02-07 | 1931-01-27 | 0 | Details |
| US1782038A | Conversion of salts into globular or similar shaped bodies | Expired / Lapsed | 1928-11-19 | 1930-11-18 | 0 | Details |
| FR690820A | Disinfectant and bactericidal products | Expired / Lapsed | 1930-02-28 | 1930-09-26 | 0 | Details |
| DE479079C | Process for the preparation of AEthylamine | Expired / Lapsed | 1925-04-04 | 1930-09-20 | 0 | Details |
| US1756943A | Artificial compositions especially those resembling rubber | Expired / Lapsed | 1928-07-05 | 1930-05-06 | 0 | Details |
| US1748315A | Manufacture of active silica | Expired / Lapsed | 1926-03-04 | 1930-02-25 | 0 | Details |
| US1744633A | Process for protecting wool, fur, rugs, and the like agains… | Expired / Lapsed | 1926-11-26 | 1930-01-21 | 0 | Details |
| US1687118A | Manufacturing fuel gas | Expired / Lapsed | 1923-09-27 | 1928-10-09 | 0 | Details |
| US1686391A | Process of precipitating heavy metals from ammoniacal solut… | Expired / Lapsed | 1927-03-11 | 1928-10-02 | 0 | Details |
| DE460818C | Containers for sterile materials | Expired / Lapsed | — | 1928-06-05 | 0 | Details |