John E. Dewhurst
36Patents
11h-index
26Co-inventors
75Inventor score
Filing activity: May 9, 1983 → Oct 22, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4519965A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 53 | Expired |
| US4581386A | Internal mold release agent for use in reaction injection molding | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4442235A | Process and composition for the production of polyurethane elastomer moldings | Chemistry; Metallurgy | 25 | Expired |
| US4897428A | Internal mold release agent for use in molding polyurethanes and/or polyureas | Chemistry; Metallurgy | 22 | Expired |
| US4886838A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 21 | Expired |
| US4539156A | Liquid diphenylmethane diisocyanate compositions | Chemistry; Metallurgy | 20 | Expired |
| US4539158A | Liquid diphenylmethane diisocyanate compositions | Chemistry; Metallurgy | 20 | Expired |
| US4539157A | Liquid diphenylmethane diisocyanate compositions | Chemistry; Metallurgy | 18 | Expired |
| US4789688A | Rim polyurethane compositions containing internal mold release agents | Chemistry; Metallurgy | 16 | Expired |
| US4764540A | Rim polyurethane or polyurea compositions containing internal mold release agents | Chemistry; Metallurgy | 16 | Expired |
| US5002999A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 13 | Expired |
| US4847307A | Rim polyurethane compositions containing internal mold release agents | Chemistry; Metallurgy | 11 | Expired |
| US6046249A | Dimensional stabilizing, cell opening additives for polyurethane flexible and rigid foams | Chemistry; Metallurgy | 10 | Expired |
| US5076989A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 9 | Expired |
| US5420186A | Internal mold release agents comprising metallic soaps compatibilized with liquid quaternary ammonium salts | Chemistry; Metallurgy | 7 | Expired |
| US5322914A | Aromatic polyisocyanurate resins and process therefor | Chemistry; Metallurgy | 7 | Expired |
| US4963640A | Process and compositions for production of moldings | Chemistry; Metallurgy | 7 | Expired |
| US5019600A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 5 | Expired |
| US8530534B2 | Trimerization catalysts from sterically hindered salts | Chemistry; Metallurgy | 4 | Active |
| US5211749A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 3 | Expired |
| US8552077B2 | Trimer catalyst additives for improving foam processability | Chemistry; Metallurgy | 2 | Active |
| US5541338A | Fatty imidazoline crosslinkers for polyurethane, polyurethaneurea and polyurea applications | Chemistry; Metallurgy | 2 | Expired |
| US5420188A | Internal mold release agent for use in reaction injection molding | Chemistry; Metallurgy | 2 | Expired |
| US5256704A | Polyurethane RIM elastomers obtained with hydroxyl-containing organotin catalysts | Chemistry; Metallurgy | 1 | Expired |
| US5317075A | Hydroxyl containing quaternary ammonium salts of fatty acids as internal mold release compositions | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.