Granted Patent
Utility
US 4,145,330 · App. 05/851,051
Flame retardant polypivalolactone compositions
Inventors:
Paul A. Zorzi, Thomas Allen, Michael E. Kucsma
Patented Case
View Patent ↗
Granted: Mar 20, 1979
Filed: Nov 14, 1977
Inventors
Paul A. Zorzi
Thomas Allen
Michael E. Kucsma
Assignee (at issue)
Ethyl 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.