Granted Patent
Utility
US 4,535,170 · App. 06/077,494
Flame retardants and compositions containing them
Inventor:
Joseph Sonnenberg
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Sep 21, 1980
Inventor
Joseph Sonnenberg
Assignee (at issue)
Raychem Limited
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.