Granted Patent
Utility
US 4,564,468 · App. 06/680,930
Flame retardant for polyurethanes
Inventor:
Henry J. Barda
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Dec 12, 1984
Inventor
Henry J. Barda
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.