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| Number | Title | Issue Date |
| 4789720 | Hydrophilic polyurethanes prepared from mixed oxyalkylene glycols A hydrophilic, thermoplastic polyurethane polymer of improved dimensional stability and mechanical strength having an average molecular weight of from about 10,000 to about 200,000 produced by reacting (A) an organic diisocyanate with (B) a blend of glyco... | 12/06/1988 |
| 4743673 | Hydrophilic carboxy polyurethanes Hydrophilic polyurethane polymers having carboxy groups in the polymer backbone are prepared by reacting a polyol component, an ester of a carboxylic acid and a polyisocyanate to form a polyurethane intermediate. The intermediate is then saponified and th... | 05/10/1988 |
| 4496535 | Polyurethane polyene compositions Shaped three-dimensional structures formed of polyurethane polyene compositions obtained by reacting from about 10 to about 50 parts by weight of a polyene in the presence of about 100 parts by weight of a hydrophilic polyurethane resin. The resulting pro... | 01/29/1985 |
| 4490423 | Polyurethane polyene compositions Three-dimensional substrates having on at least one surface a coating formed of a polyurethane polyene composition obtained by reacting from about 10 to about 50 parts by weight of a polyene in the presence of about 100 parts by weight of a hydrophilic po... | 12/25/1984 |
| 4454309 | Polyurethane polyene compositions Polyurethane polyene compositions are obtained by reacting from about 10 to about 50 parts by weight of a polyene in the presence of about 100 parts by weight of a hydrophilic polyurethane resin. The resulting products will swell and increase in weight up... | 06/12/1984 |
| 4451635 | Polyurethane quaternary ammonium salts Polyurethane quaternary ammonium salts are obtained by heating a solution of a polyurethane resin characterized by having present in the polymer backbone hydroxyl groups and at least one substituent selected from the group consisting of carboxylate radica... | 05/29/1984 |
| 4439585 | Polyurethane diacrylate compositions as carrier for pharmacological agents Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 65 to about 95 weight percent of a hydrophilic polyurethane resin. The compositions will form a hydrogel upon immersion in water and are permeable to ... | 03/27/1984 |
| 4439584 | Gas and ion permeable membranes formed of polyurethane diacrylate compositions Gas and ion permeable membranes useful as burn dressings, surgical drapes and the like formed of polyurethane diacrylate compositions obtained by reacting a diacrylate in the presence of from about 65 to about 95 weight percent of a hydrophilic polyuretha... | 03/27/1984 |
| 4439583 | Polyurethane diacrylate compositions useful in forming canulae Canulae formed of or having a coating of polyurethane diacrylate compositions obtained by reacting a diacrylate in the presence of from about 65 to about 95 weight percent of a hydrophilic polyurethane resin. The compositions will form a hydrogel upon imm... | 03/27/1984 |
| 4424305 | Surgical implants formed of polyurethane diacrylate compositions Surgical implants, intrauterine devices and the like formed of polyurethane diacrylate compositions obtained by reacting a diacrylate in the presence of from about 65 to about 95 weight percent of a hydrophilic polyurethane resin. The compositions will fo... | 01/03/1984 |
| 4408023 | Polyurethane diacrylate compositions useful for contact lenses and the like Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 30 to about 95 weight percent of a hydrophilic polyurethane resin. The resulting products will form a hydrogel upon immersion in water and are permeab... | 10/04/1983 |
| 4359558 | Polyurethane diacrylate compositions Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 30 to about 95 weight percent of a hydrophilic polyurethane resin. The resulting products will form a hydrogel upon immersion in water and are permeab... | 11/16/1982 |
| 4255550 | Polyurethane polymers characterized by carboxylate groups and hydroxyl groups in the polymer backbone Water insoluble polyurethane polyether polymers that are soluble in ethanol at pH 11 characterized by a molecular weight above 6,000 and having carboxylate groups and hydroxyl groups in the polymer backbone are prepared by reacting a mixture of polyols, a... | 03/10/1981 |
| 4156067 | Polyurethane polymers characterized by lactone groups and hydroxyl groups in the polymer backbone Polyurethane polymers characterized by a molecular weight above 6,000 and having lactone groups and hydroxyl groups in the polymer backbone are prepared by reacting a mixture of polyols, a polyfunctional lactone and a polyfunctional isocyanate proportione... | 05/22/1979 |
| 4156066 | Polyurethane polymers characterized by lactone groups and hydroxyl groups in the polymer backbone Polyurethane polymers characterized by a molecular weight above 6,000 and having lactone groups and hydroxyl groups in the polymer backbone are prepared by reacting a mixture of polyglycols proportioned so as to provide the desired polymer properties, a p... | 05/22/1979 |
