Granted Patent
Utility
US 5,086,155 · App. 07/589,110
1-isopropyl-2-tolylimidazole as an epoxy resin curative
Inventors:
Harold G. Waddill, Wei-Yang Su, George P. Speranza
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Sep 27, 1990
Inventors
Harold G. Waddill
Wei-Yang Su
George P. Speranza
Assignee (at issue)
Texaco Chemical Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.