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Patent applications and USPTO patent grants for Chang; Laurence W..The latest application filed is for "substituted urea and oxime modified amino crosslinking agents, curable compositions containing the same and process for preparing pyrrolidone urea".
Patent | Date |
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Substituted urea and oxime modified amino crosslinking agents, curable compositions containing the same and process for preparing pyrrolidone urea Grant 5,665,852 - Singh , et al. September 9, 1 | 1997-09-09 |
Surface-modified polyacrylonitrile beads Grant 5,418,284 - Chang , et al. * May 23, 1 | 1995-05-23 |
Tertiary aralkyl urethanes and isocyanates derived therefrom Grant 4,439,616 - Singh , et al. March 27, 1 | 1984-03-27 |
Manufacture of isocyanates Grant 4,379,767 - Alexanian , et al. April 12, 1 | 1983-04-12 |
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