Granted Patent
Utility
US 4,769,438 · App. 07/067,068
Aminated propoxylated 1,4-butanediol epoxy resin adducts as epoxy resin curatives
Inventors:
Robert L. Zimmerman, Harold G. Waddill, Kathy B. Sellstrom
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jun 29, 1987
Inventors
Robert L. Zimmerman
Harold G. Waddill
Kathy B. Sellstrom
Assignee (at issue)
Texaco 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.