Granted Patent
Utility
US 4,581,403 · App. 06/713,141
ABS plastic made transparent and flame retardant with Br.sub.2 -Br.sub.8 diphenyl ethers
Inventor:
Thomas W. Stemple
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Mar 18, 1985
Inventor
Thomas W. Stemple
Assignee (at issue)
Borg-Warner Chemicals, Inc.
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.