Granted Patent
Utility
US 4,393,148 · App. 06/431,545
Reaction of t-alkylhydrazinium salts and ogranic peroxides to foam unsaturated polyester resins
Inventor:
Ernest R. Kamens
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Sep 30, 1982
Inventor
Ernest R. Kamens
Assignee (at issue)
Pennwalt Corporation
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.