Granted Patent
Utility
US 5,225,468 · App. 07/721,041
Non-tarnishing flame retardant insulation compositions
Inventor:
James W. Biggs
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Jun 26, 1991
Inventor
James W. Biggs
Assignee (at issue)
Quantum Chemical 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.