Thirumurti Narayan
76Patents
16h-index
37Co-inventors
84Inventor score
Filing activity: Dec 19, 1974 → Dec 29, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4738991A | Storage stable polyisocyanates characterized by allophanate linkages | Chemistry; Metallurgy | 42 | Expired |
| US4092276A | Process for the preparation of foams characterized by isocyanurate and urethane linkages | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4165414A | Urethane-modified isocyanurate foams having improved insulating and flame retardant properties | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4284730A | Liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate compositions and microcellular foams made therefrom | Emerging Cross-Sectional Technologies | 26 | Expired |
| US3981829A | Process for the preparation of carbodiimide-isocyanurate foams | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4359541A | Process for the preparation of polyisocyanurate dispersions and compositions prepared therefrom | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5236960A | Water-blown polyurethane integral skin foam | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4743626A | Liquid carbodiimide-uretonimine modified polymethylene polyphenylene polyisocyanates and polyurethane foams made therefrom | Chemistry; Metallurgy | 21 | Expired |
| US4677154A | Stabilizer package for polyurethane comprising a substituted cresol and another costabilizer | Chemistry; Metallurgy | 20 | Expired |
| US4359550A | Polyisocyanurate polymers, dispersions, and cellular and non-cellular polyurethane products prepared therefrom | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4148980A | Novel carboxylate catalysts for the preparation of foams characterized by polyisocyanurate, polyurethane and poly (urethane-isocyanurate) linkages | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4382125A | Isocyanurate-modified polymethylene polyphenylene polyisocyanate compositions | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4791148A | Isocyanate terminated quasi-prepolymers useful for preparing polyurethane/polyisocyanurate foams having low thermal conductivity | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4166164A | Process for the preparation of carbodiimide-isocyanurate foams | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5338820A | Water-blown polyurethane integral skin foam | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5216035A | Water-blown polyurethane integral skin foam | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4490490A | High load bearing flexible polyurethane foams | Chemistry; Metallurgy | 16 | Expired |
| US5283311A | Fatty prepolymers and fatty-modified polyisocyanates as internal mold release agents | Chemistry; Metallurgy | 16 | Expired |
| US4757095A | Utilization of lactones and lactams in the preparation of polyurethane-polyurea products | Chemistry; Metallurgy | 15 | Expired |
| US6120699A | Storage stable methylene bis(phenylisocyanate) compositions | Chemistry; Metallurgy | 14 | Expired |
| US4743627A | Liquid isocyanurate-modified polymethylene bis(phenylisocyanate) compositions containing a high two-ring methylene bis(phenylisocyanate) content | Chemistry; Metallurgy | 14 | Expired |
| US4410641A | Polysiocyanurate-polyurethane foams | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4717774A | Process for the preparation of toluene diamines | Chemistry; Metallurgy | 14 | Expired |
| US4424288A | Carbodiimide-modified polymethylene polyphenylene polyisocyanates for use in the preparation of polyisocyanurate-polyurethane foams | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5436277A | Polyisocyanate compositions for the preparation of flexible polyurethane foams | Chemistry; Metallurgy | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.