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Patent applications and USPTO patent grants for Hawker; Leslie E..The latest application filed is for "polyurethane elastomers prepared from polyol or polymer/polyol-chain extender mixtures".
Patent | Date |
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Polyurethane elastomers prepared from polyol or polymer/polyol-chain extender mixtures Grant 4,312,973 - Critchfield , et al. January 26, 1 | 1982-01-26 |
Mixtures of extenders and polyols or polymer/polyols useful in polyurethane production Grant 4,226,756 - Critchfield , et al. October 7, 1 | 1980-10-07 |
Polymer/polyols from high ethylene oxide content polyols Grant 4,125,505 - Critchfield , et al. November 14, 1 | 1978-11-14 |
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