Granted Patent
Utility
US 5,200,475 · App. 07/709,903
Epoxy resin compositions containing disecondary aromatic amines
Inventor:
Kenneth C. Dewhirst
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Jun 3, 1991
Inventor
Kenneth C. Dewhirst
Assignee (at issue)
SHELL OIL COMPANY
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.