Rohm and Haas Co
Rohm and HActive Patents
0
Total Holdings
168
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| EP0248524A2 | Method of separating and/or purifying bio-affecting substan… | Expired / Lapsed | 1987-04-27 | — | 16 | Details |
| DE1001977B | Process for the production of surface-active polyglycol est… | Expired / Lapsed | 1954-05-03 | — | 0 | Details |
| GB681411A | Improvements in or relating to process of regenerating an e… | Expired / Lapsed | 1950-09-08 | — | 0 | Details |
| US5399535A | Reticulated ceramic products | Expired / Lapsed | 1993-08-17 | 1995-03-21 | 18 | Details |
| EP0423938B1 | Ligand-containing medium for chromatographic separation, pr… | Expired / Lapsed | 1990-09-17 | 1994-03-02 | 12 | Details |
| US4542169A | Biomedical devices containing isothiazolones to control bac… | Expired / Lapsed | 1983-12-12 | 1985-09-17 | 17 | Details |
| US4468498A | Sequential heteropolymer dispersion and a particulate mater… | Expired / Lapsed | 1982-02-25 | 1984-08-28 | 16 | Details |
| US4463150A | Acrylic or methacrylic terminated oligomers | Expired / Lapsed | 1982-04-30 | 1984-07-31 | 4 | Details |
| US4243403A | 3-Isothiazolones | Expired / Lapsed | 1978-05-30 | 1981-01-06 | 9 | Details |
| US4200695A | Flocs for filtration and deionization prepared from cationi… | Expired / Lapsed | 1978-09-19 | 1980-04-29 | 10 | Details |
| US4191812A | Ion exchange process involving emulsion ion exchange resins | Expired / Lapsed | 1978-09-19 | 1980-03-04 | 14 | Details |
| US4183991A | Process for preparing highly filled acrylic articles | Expired / Lapsed | 1977-05-02 | 1980-01-15 | 19 | Details |
| US4167616A | Polymerization with diborane adducts or oligomers of boron-… | Expired / Lapsed | 1977-08-22 | 1979-09-11 | 18 | Details |
| US4152189A | Method of utilizing polyacrylic hot-melt adhesives | Expired / Lapsed | 1977-03-11 | 1979-05-01 | 7 | Details |
| US4145465A | Backing-free massive thickness pressure sensitive adhesive … | Expired / Lapsed | 1973-11-02 | 1979-03-20 | 24 | Details |
| US4077926A | Pressure sensitive adhesive containing polymerized alkoxyal… | Expired / Lapsed | 1974-04-24 | 1978-03-07 | 15 | Details |
| US4076622A | Microbiocidal macroreticular ion exchange resins, their met… | Expired / Lapsed | 1976-06-22 | 1978-02-28 | 10 | Details |
| US4064042A | Purification of blood using partially pyrolyzed polymer par… | Expired / Lapsed | 1976-02-02 | 1977-12-20 | 7 | Details |
| US3985703A | Process for manufacture of acrylic core/shell polymers | Expired / Lapsed | 1975-06-24 | 1976-10-12 | 9 | Details |
| US3816355A | Macroreticular sulfonated pyridine-divinylbenzene resins | Expired / Lapsed | 1971-12-06 | 1974-06-11 | 2 | Details |
| US3801575A | 3-hydroxyisothiazoles | Expired / Lapsed | 1972-01-24 | 1974-04-02 | 0 | Details |
| US3794584A | Removal of poisons and drugs from blood | Expired / Lapsed | 1970-04-09 | 1974-02-26 | 0 | Details |
| US3755224A | Biocide for plasticized pvc | Expired / Lapsed | 1971-03-12 | 1973-08-28 | 20 | Details |
| US3740366A | Pressure sensitive adhesive containing carboxylic acid grou… | Expired / Lapsed | 1971-01-22 | 1973-06-19 | 0 | Details |
| US3705645A | Inflatable flexible container and fabric for making it | Expired / Lapsed | 1971-04-30 | 1972-12-12 | 11 | Details |
| US3694393A | Method of producing paper,and paper obtained | Expired / Lapsed | 1971-09-13 | 1972-09-26 | 0 | Details |
| US3551479A | Sulfonic alkylene esters of itaconic and alpha-methylene gl… | Expired / Lapsed | 1967-03-20 | 1970-12-29 | 0 | Details |
| US3468973A | Copolymer composition for coating and impregnating purposes | Expired / Lapsed | 1966-01-18 | 1969-09-23 | 0 | Details |
| US3448173A | Acrylic modifiers which impart impact resistance and transp… | Expired / Lapsed | 1966-02-18 | 1969-06-03 | 0 | Details |
| US3447906A | Automatic gravimetric titrator for batch operation | Expired / Lapsed | 1966-01-21 | 1969-06-03 | 0 | Details |
| US3426101A | Acrylic modifiers which impart impact resistance and transp… | Expired / Lapsed | 1965-08-25 | 1969-02-04 | 0 | Details |
| US3342893A | Alkylated condensate of formaldehyde and a diamide of an m-… | Expired / Lapsed | 1963-11-29 | 1967-09-19 | 4 | Details |
| US3301919A | Blend of particulated polyvinyl chloride, and a terpolymer … | Expired / Lapsed | 1964-04-21 | 1967-01-31 | 2 | Details |
| US3264155A | Method of making extensible fabric | Expired / Lapsed | 1961-05-05 | 1966-08-02 | 2 | Details |
| US3255030A | Stretchable tubular knit fabric of yarn coated with elastom… | Expired / Lapsed | 1963-02-12 | 1966-06-07 | 0 | Details |
| US3246946A | Method of crease-proofing cellulosic fabrics and fabrics ob… | Expired / Lapsed | 1963-02-19 | 1966-04-19 | 5 | Details |
| US3245932A | Water-soluble 2-dimethylamino-ethanol salts of (c1-c2) alky… | Expired / Lapsed | 1965-05-12 | 1966-04-12 | 2 | Details |
| US3390139A | Nu-vinyl-2-piperazinones | Expired / Lapsed | 1964-03-04 | 1966-03-11 | 0 | Details |
| US3234724A | Composite elastic yarn and the process therefor | Expired / Lapsed | 1963-10-16 | 1966-02-15 | 2 | Details |
| US3234725A | Process for making elastic yarn | Expired / Lapsed | 1963-07-09 | 1966-02-15 | 2 | Details |
| US3228986A | Boron-containing compounds | Expired / Lapsed | 1961-03-24 | 1966-01-11 | 1 | Details |
| US3223643A | Liquid acid-detergent-sanitizer composition | Expired / Lapsed | 1964-11-12 | 1965-12-14 | 2 | Details |
| US3200099A | Thermosetting compositions comprising methylene diethers an… | Expired / Lapsed | 1963-06-10 | 1965-08-10 | 2 | Details |
| US3170901A | Novel quaternary ammonium compounds and polymers thereof | Expired / Lapsed | 1960-12-27 | 1965-02-23 | 1 | Details |
| US3150118A | Novel monomers, polymers, lacquers, and coated articles | Expired / Lapsed | 1960-10-12 | 1964-09-22 | 2 | Details |
| US3142664A | Oil soluble copolymer of a nu-vinyl pyrrolidinone and an al… | Expired / Lapsed | 1955-08-19 | 1964-07-28 | 2 | Details |
| US3140265A | Fibrous textile and industrial fabrics | Expired / Lapsed | 1959-09-01 | 1964-07-07 | 2 | Details |
| US3107726A | Recovery of oil from tar sands and other oil-bearing format… | Expired / Lapsed | 1961-02-03 | 1963-10-22 | 2 | Details |
| US3094494A | Improved ion exchange cellular products | Expired / Lapsed | 1959-01-26 | 1963-06-18 | 2 | Details |
| US3084073A | Copolymers of alkyl acrylate, methoxymethyl vinyl sulfide, … | Expired / Lapsed | 1959-12-10 | 1963-04-02 | 2 | Details |
| US3083172A | Graft copolymer of an acrylic ester with poly(vinyl acetate) | Expired / Lapsed | 1959-02-26 | 1963-03-26 | 2 | Details |
| US3082184A | Coating composition comprising an alcohol-modified aminopla… | Expired / Lapsed | 1959-01-09 | 1963-03-19 | 1 | Details |
| US3062379A | Ion exchange fabrics | Expired / Lapsed | 1959-11-05 | 1962-11-06 | 2 | Details |
| US3055729A | Process for producing ion-exchange fibers, films, and the l… | Expired / Lapsed | 1959-05-14 | 1962-09-25 | 1 | Details |
| US3050425A | Quick-tack polymeric adhesive for fibrous laminae | Expired / Lapsed | 1959-03-25 | 1962-08-21 | 2 | Details |
| US3029228A | Hydrolyzed polymers of alkyl methacrylates and methods of p… | Expired / Lapsed | 1957-10-15 | 1962-04-10 | 2 | Details |
| US3028367A | Copolymers of hydroxyalkyl acrylates and methacrylates and … | Expired / Lapsed | 1958-04-14 | 1962-04-03 | 2 | Details |
| US3024207A | Ion-exchange products and methods for making and suing them | Expired / Lapsed | 1958-04-10 | 1962-03-06 | 2 | Details |
| US3023162A | Dewatering aqueous suspensions with quaternized dialkylamin… | Expired / Lapsed | 1958-03-10 | 1962-02-27 | 1 | Details |
| US3021372A | Low foam, high wetting polypropyleneterminated alkylphenoxy… | Expired / Lapsed | 1959-07-16 | 1962-02-13 | 2 | Details |
| US3015595A | Bonded non-woven fibrous products | Expired / Lapsed | 1958-04-09 | 1962-01-02 | 2 | Details |
| US2997745A | Process for producing abrasionresistant plastic articles | Expired / Lapsed | 1958-01-14 | 1961-08-29 | 2 | Details |
| US2987445A | Drug composition | Expired / Lapsed | 1958-10-10 | 1961-06-06 | 2 | Details |
| US2984584A | Process of making carbon impregnated gas resistant fabrics … | Expired / Lapsed | 1945-01-31 | 1961-05-16 | 2 | Details |
| US2980657A | Quaternary ammonium compounds of polymers of acrylamido typ… | Expired / Lapsed | 1954-07-06 | 1961-04-18 | 2 | Details |
| US2976203A | Adhesive composition, methods of employing it, and laminate… | Expired / Lapsed | 1957-09-06 | 1961-03-21 | 2 | Details |
| US2974101A | Ion-exchange assemblies and methods of treating liquids | Expired / Lapsed | 1957-05-22 | 1961-03-07 | 1 | Details |
| US2963453A | Acrylic and methacrylic acid resins controllably crosslinke… | Expired / Lapsed | 1957-03-15 | 1960-12-06 | 2 | Details |
| US2954358A | Aqueous dispersion containing acrylic acid copolymer and al… | Expired / Lapsed | 1957-10-01 | 1960-09-27 | 2 | Details |
| US2952210A | Fluid pump | Expired / Lapsed | 1958-05-15 | 1960-09-13 | 0 | Details |
| US2933460A | Ion-exchange fibers, films and the like from sulfur contain… | Expired / Lapsed | 1956-05-29 | 1960-04-19 | 2 | Details |
| US2926119A | Quaternary ammonium bactericides | Expired / Lapsed | 1958-05-02 | 1960-02-23 | 2 | Details |
| US2923646A | Release-coatings, film- and sheetcasting bases for substrat… | Expired / Lapsed | 1957-12-12 | 1960-02-02 | 2 | Details |
| US2923653A | Bonded non-woven fibrous products and methods for manufactu… | Expired / Lapsed | 1956-08-13 | 1960-02-02 | 2 | Details |
| US2922732A | Fiber-reinforced resin-bearing tissues, films or sheets, an… | Expired / Lapsed | 1956-12-11 | 1960-01-26 | 2 | Details |
| US2919230A | Hydrophilic base therapeutic compositions comprising cation… | Expired / Lapsed | 1953-10-29 | 1959-12-29 | 1 | Details |
| US2915486A | Polyester compositions, water-dispersible polyester-aminopl… | Expired / Lapsed | 1956-03-05 | 1959-12-01 | 2 | Details |
| US2897182A | Oxazine and oxazoline polymers | Expired / Lapsed | 1957-09-06 | 1959-07-28 | 2 | Details |
| US2886474A | Compositions for binding pigments | Expired / Lapsed | 1954-04-14 | 1959-05-12 | 2 | Details |
| US2885374A | Amylaceous coating composition containing hexamethylenetetr… | Expired / Lapsed | 1955-12-21 | 1959-05-05 | 2 | Details |
| US2879178A | Coated leather products and methods for producing them | Expired / Lapsed | 1956-06-29 | 1959-03-24 | 1 | Details |
| US2876209A | Organic silicon compounds and methods for making them | Expired / Lapsed | 1955-06-01 | 1959-03-03 | 1 | Details |
| US2866256A | Wool-like artificial fibers | Expired / Lapsed | 1956-04-05 | 1958-12-30 | 2 | Details |
| US2838440A | Dusting powder of carboxylic cationexchange resin and powde… | Expired / Lapsed | 1953-10-29 | 1958-06-10 | 2 | Details |
| US2827359A | Process for stabilization of protein textiles with 4-vinyl … | Expired / Lapsed | 1954-03-22 | 1958-03-18 | 2 | Details |
| US2827426A | Cationic permselective membranes and their use in electroly… | Expired / Lapsed | 1954-02-12 | 1958-03-18 | 2 | Details |
| US2824816A | Method for treating leather | Expired / Lapsed | 1954-05-13 | 1958-02-25 | 2 | Details |
| US2820043A | Preparation of imidazoline propionic acid derivatives | Expired / Lapsed | 1954-10-26 | 1958-01-14 | 2 | Details |
| US2812350A | (5, 5, 7, 7-tetramethyl-2-octenyl) trialkyl ammonium salts | Expired / Lapsed | 1955-08-29 | 1957-11-05 | 2 | Details |
| US2810713A | Quaternary ammonium compounds and methods of producing them | Expired / Lapsed | 1955-03-21 | 1957-10-22 | 2 | Details |
| US2808349A | Textile and other shaped products having antistatic qualiti… | Expired / Lapsed | 1955-03-21 | 1957-10-01 | 2 | Details |
| US2790735A | Coated paper products and methods of making them | Expired / Lapsed | 1955-01-31 | 1957-04-30 | 2 | Details |
| US2765228A | Cellulosic fibrous products and methods of producing them | Expired / Lapsed | 1955-03-03 | 1956-10-02 | 2 | Details |
| US2754280A | Emulsions of ionically cross-linked resins and methods for … | Expired / Lapsed | 1954-04-23 | 1956-07-10 | 2 | Details |
| US2736741A | Organic reactions involving acetals in the presence of mixe… | Expired / Lapsed | 1951-09-15 | 1956-02-28 | 2 | Details |
| US2719072A | The stabilization of protein-containing textiles and the re… | Expired / Lapsed | 1953-04-10 | 1955-09-27 | 2 | Details |
| US2706195A | Bis(5, 5, 7, 7-tetramethyl-2-octenyl) dialkylammonium salts | Expired / Lapsed | 1952-06-26 | 1955-04-12 | 2 | Details |
| US2699435A | Polyurea resins | Expired / Lapsed | 1952-07-22 | 1955-01-11 | 2 | Details |
| US2696504A | Polyaminopolyureas | Expired / Lapsed | 1952-07-12 | 1954-12-07 | 3 | Details |
| US2694696A | N, n-ethyleneureidoalkyl vinyl ethers | Expired / Lapsed | 1953-04-10 | 1954-11-16 | 2 | Details |
| US2692256A | Esters of vinyloxyalkoxy compounds and unsaturated carboxyl… | Expired / Lapsed | 1951-03-09 | 1954-10-19 | 2 | Details |
| US2689844A | Methylol derivatives of polymers of ureidoalkyl vinyl ethers | Expired / Lapsed | 1952-04-16 | 1954-09-21 | 2 | Details |
| US2681319A | Permselective films of anionexchange resins | Expired / Lapsed | 1951-01-10 | 1954-06-15 | 2 | Details |
| US2623023A | Expanded, cellular, resinous products containing polyepoxid… | Expired / Lapsed | 1951-07-28 | 1952-12-23 | 2 | Details |
| US2616874A | Methylol derivatives of ureido-polyamines | Expired / Lapsed | 1951-07-19 | 1952-11-04 | 2 | Details |
| US2605253A | Urea resins containing dimethylamino substituents | Expired / Lapsed | 1950-12-16 | 1952-07-29 | 2 | Details |
| US2600446A | Copolymers of methacrylates and allyl esters | Expired / Lapsed | 1949-07-15 | 1952-06-17 | 2 | Details |
| US2591573A | Resinous insoluble reaction products of tertiary amines wit… | Expired / Lapsed | 1947-07-05 | 1952-04-01 | 1 | Details |
| US2582911A | Preparation of acrylic esters | Expired / Lapsed | 1950-07-12 | 1952-01-15 | 2 | Details |
| US2548438A | Multicellular acrylic resin | Expired / Lapsed | 1948-11-24 | 1951-04-10 | 2 | Details |
| US2535010A | Transetherification of beta-ethersubstituted esters | Expired / Lapsed | 1948-10-02 | 1950-12-19 | 2 | Details |
| US2525777A | Butenylene bis | Expired / Lapsed | 1949-06-29 | 1950-10-17 | 2 | Details |
| US2511481A | New-type drum package | Expired / Lapsed | 1949-05-11 | 1950-06-13 | 0 | Details |
| US2504064A | Polyethyleneglycol ethers of bis (di-alkyl-hydroxyphenyl)-m… | Expired / Lapsed | 1946-04-05 | 1950-04-11 | 2 | Details |
| US2499134A | Method of providing adhesion between surfaces | Expired / Lapsed | 1944-11-29 | 1950-02-28 | 2 | Details |
| US2464826A | Acrylic resin laminations | Expired / Lapsed | 1943-12-30 | 1949-03-22 | 0 | Details |
| US2430616A | Instrument lens and dial | Expired / Lapsed | 1945-08-06 | 1947-11-11 | 0 | Details |
| US2420949A | Carboxyalkyl cellulose ether fibers and films of good wet s… | Expired / Lapsed | 1943-09-11 | 1947-05-20 | 0 | Details |
| US2401642A | Extrusion of thermoplastic material | Expired / Lapsed | 1942-10-23 | 1946-06-04 | 0 | Details |
| US2395989A | Quaternary ammonium nitrophenates | Expired / Lapsed | 1943-09-11 | 1946-03-05 | 0 | Details |
| US2385486A | Production of thermoplastic sheets of nonuniform thickness | Expired / Lapsed | 1942-03-28 | 1945-09-25 | 0 | Details |
| US2383775A | Insecticidal compositions | Expired / Lapsed | 1944-02-17 | 1945-08-28 | 0 | Details |
| US2367642A | Method of preparing thermoplastic domes | Expired / Lapsed | 1942-03-28 | 1945-01-16 | 0 | Details |
| US2365637A | Method of shaping thermoplastic domes | Expired / Lapsed | 1942-08-28 | 1944-12-19 | 0 | Details |
| US2352922A | Paper manufacture | Expired / Lapsed | 1939-10-06 | 1944-07-04 | 0 | Details |
| US2349797A | Alkali-soluble carboxyethyl cellulose ether | Expired / Lapsed | 1942-01-17 | 1944-05-30 | 0 | Details |
| US2347320A | Casting composition | Expired / Lapsed | 1940-06-27 | 1944-04-25 | 0 | Details |
| US2346107A | Plastic methyl methacrylate | Expired / Lapsed | 1939-12-19 | 1944-04-04 | 0 | Details |
| US2339184A | Stabilization of aqueous dispersions of polymers of vinyl e… | Expired / Lapsed | 1941-07-05 | 1944-01-11 | 0 | Details |
| US2338983A | Process of treating fabrics | Expired / Lapsed | 1939-05-01 | 1944-01-11 | 0 | Details |
| US2337421A | Preparation of nitriles from primary alcohols using catalys… | Expired / Lapsed | 1941-10-07 | 1943-12-21 | 0 | Details |
| US2328901A | Nitrogenous condensation product | Expired / Lapsed | 1939-08-22 | 1943-09-07 | 0 | Details |
| US2328922A | Process of preparing vinyl alcoholmethacrylic ester copolym… | Expired / Lapsed | 1939-06-13 | 1943-09-07 | 0 | Details |
| US2328525A | Method of preparing sheets | Expired / Lapsed | 1941-08-23 | 1943-08-31 | 0 | Details |
| US2326078A | Process of polymerizing methacrylic acid | Expired / Lapsed | 1940-05-08 | 1943-08-03 | 0 | Details |
| US2320924A | Translucent polymeric methacrylic esters | Expired / Lapsed | 1939-05-08 | 1943-06-01 | 0 | Details |
| US2301509A | Fixation of sizes | Expired / Lapsed | 1939-10-21 | 1942-11-10 | 0 | Details |
| US2295699A | Process of finishing textiles | Expired / Lapsed | 1938-06-01 | 1942-09-15 | 0 | Details |
| US2294299A | Insecticidal compositions | Expired / Lapsed | 1940-11-28 | 1942-08-25 | 0 | Details |
| US2275991A | Textile printing paste | Expired / Lapsed | 1938-05-28 | 1942-03-10 | 0 | Details |
| US2273700A | Decorated foil and film | Expired / Lapsed | 1939-05-17 | 1942-02-17 | 0 | Details |
| US2264376A | Preparation of methacrylic polymer molding material | Expired / Lapsed | 1939-09-30 | 1941-12-02 | 0 | Details |
| US2263385A | Process for dyeing leather | Expired / Lapsed | 1939-05-12 | 1941-11-18 | 0 | Details |
| US2250485A | Process for polymerizing acrylic and methacrylic acid esters | Expired / Lapsed | 1939-08-12 | 1941-07-29 | 0 | Details |
| US2250445A | Process for producing acetylenic alcohols | Expired / Lapsed | 1938-10-01 | 1941-07-29 | 0 | Details |
| US2229024A | Aromatic ether of polyalkoxyalkylalkylene polyamines and pr… | Expired / Lapsed | 1939-05-23 | 1941-01-21 | 0 | Details |
| US2225867A | Parasiticidal compositions containing copper and zinc oxides | Expired / Lapsed | 1939-06-20 | 1940-12-24 | 0 | Details |
| US2219375A | Process of treating textiles and product | Expired / Lapsed | 1934-08-31 | 1940-10-29 | 0 | Details |
| US2216045A | Water soluble ethers of alpha cellulose | Expired / Lapsed | 1937-05-27 | 1940-09-24 | 0 | Details |
| US2205355A | Treatment of leather | Expired / Lapsed | 1939-08-22 | 1940-06-18 | 0 | Details |
| US2204512A | Tanning material | Expired / Lapsed | 1937-10-06 | 1940-06-11 | 0 | Details |
| US2204520A | Leather finishing | Expired / Lapsed | 1937-01-06 | 1940-06-11 | 0 | Details |
| US2191922A | Quaternary methallyl ammonium halides | Expired / Lapsed | 1936-11-10 | 1940-02-27 | 0 | Details |
| US2160054A | Polymerization process | Expired / Lapsed | 1933-03-23 | 1939-05-30 | 0 | Details |
| US2157049A | Process of treating cast polymeric resin sheets | Expired / Lapsed | 1937-04-15 | 1939-05-02 | 0 | Details |
| US2154639A | Process for the manufacture of polymerization products | Expired / Lapsed | 1935-12-04 | 1939-04-18 | 0 | Details |
| US2142445A | Method of shaping thermoplastic sheets | Expired / Lapsed | 1936-11-27 | 1939-01-03 | 0 | Details |
| US2137465A | Process of finishing textiles | Expired / Lapsed | 1937-05-11 | 1938-11-22 | 0 | Details |
| US2137377A | Laminated glass | Expired / Lapsed | 1934-02-20 | 1938-11-22 | 0 | Details |
| US2129478A | Polymerization process | Expired / Lapsed | 1934-12-12 | 1938-09-06 | 0 | Details |
| US2115250A | Organic nitrogen bases and their salts | Expired / Lapsed | 1936-05-28 | 1938-04-26 | 0 | Details |
| US2095944A | Laminated glass and process for preparing | Expired / Lapsed | 1932-10-19 | 1937-10-12 | 0 | Details |
| US2091627A | Composition of matter and process | Expired / Lapsed | 1934-06-08 | 1937-08-31 | 0 | Details |
| US2077479A | Polythiocyano esters | Expired / Lapsed | 1935-09-27 | 1937-04-20 | 0 | Details |
| US2067580A | Method of polymerizing organic compounds | Expired / Lapsed | 1934-10-16 | 1937-01-12 | 0 | Details |
| US2009015A | Cellulose solutions | Expired / Lapsed | 1933-06-19 | 1935-07-23 | 0 | Details |
| US1990812A | Acid resisting vitreous enamel | Expired / Lapsed | 1932-02-05 | 1935-02-12 | 0 | Details |
| US1883042A | Process of fatliquoring | Expired / Lapsed | 1930-06-20 | 1932-10-18 | 0 | Details |