Granted Patent
Utility
US 4,666,967 · App. 06/821,178
Flame retardants for polyurethanes
Inventors:
Norman Richardson, Brian G. Clubley, Richard J. Dellar
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Jan 22, 1986
Inventors
Norman Richardson
Brian G. Clubley
Richard J. Dellar
Assignee (at issue)
Ciba-Geigy
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.