Granted Patent
Utility
US 4,873,341 · App. 07/246,209
White bis-imide flame retardants
Inventor:
Keith G. Anderson
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Sep 19, 1988
Inventor
Keith G. Anderson
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.