Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937012 | Low temperature stable polymethylene polyphenylene polyisocyanates | John W. Lightsey | 1990-06-26 |
| 4743627 | Liquid isocyanurate-modified polymethylene bis(phenylisocyanate) compositions containing a high two-ring methylene bis(phenylisocyanate) content | Thirumurti Narayan | 1988-05-10 |
| 4717774 | Process for the preparation of toluene diamines | Thirumurti Narayan | 1988-01-05 |
| 4677154 | Stabilizer package for polyurethane comprising a substituted cresol and another costabilizer | Thirumurti Narayan | 1987-06-30 |
| 4529746 | Alkylated vicinal toluenediamines and their use as chain extenders in the preparation of polyurethane-polyurea elastomers | Robert A. Markovs, John W. Lightsey, Gerhard G. Ramlow | 1985-07-16 |
| 4465638 | Process for using sediments developed during storage of pure MDI | Robert Schaaf, Lewis N. Medaugh, William E. Volz | 1984-08-14 |
| 4424288 | Carbodiimide-modified polymethylene polyphenylene polyisocyanates for use in the preparation of polyisocyanurate-polyurethane foams | John T. Patton, Jr., Thirumurti Narayan | 1984-01-03 |
| 4384052 | Polyurethanes produced from an adduct of an organic polyisocyanate and certain amines | Robert L. McBrayer, John G. Demou, William E. Volz | 1983-05-17 |
| 4382125 | Isocyanurate-modified polymethylene polyphenylene polyisocyanate compositions | Thirumurti Narayan, John T. Patton, Jr. | 1983-05-03 |
| 4359550 | Polyisocyanurate polymers, dispersions, and cellular and non-cellular polyurethane products prepared therefrom | Thirumurti Narayan, Gerhard G. Ramlow | 1982-11-16 |
| 4332953 | Carbamylbiuret-modified polyisocyanates | Donald L. Christman | 1982-06-01 |
| 4331809 | Carbamylbiuret-modified polyisocyanates | Donald L. Christman | 1982-05-25 |
| 4331810 | Carbamylbiuret-modified polyisocyanates | Donald L. Christman | 1982-05-25 |
| 4330636 | Carbamylbiuret-modified polyisocyanates | Donald L. Christman | 1982-05-18 |
| 4284730 | Liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate compositions and microcellular foams made therefrom | Thirumurti Narayan | 1981-08-18 |
| 4271087 | Carbamylbiuret-modified polyisocyanates | Donald L. Christman | 1981-06-02 |
| 4199524 | Stable liquid carbodiimide-containing polyisocyanate compositions | Robert Schaaf, Moses Cenker | 1980-04-22 |
| 4198489 | Polyurethane foams prepared from highly stable liquid carbodiimide-containing 4,4'-diphenylmethane diisocyanate | Robert Schaaf, Moses Cenker | 1980-04-15 |