Granted Patent
Utility
US 4,180,495 · App. 05/895,839
Polyester resins flame retarded by poly(metal phosphinate)s
Inventor:
Stanley R. Sandler
Patented Case
View Patent ↗
Granted: Dec 25, 1979
Filed: Apr 13, 1978
Inventor
Stanley R. Sandler
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.