Granted Patent
Utility
US 5,093,458 · App. 07/628,558
4-methyl-2-morpholinone as a curative for epoxy resin compositions
Inventors:
Harold G. Waddill, Wei-Yang Su
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Dec 17, 1990
Inventors
Harold G. Waddill
Wei-Yang Su
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.