Granted Patent
Utility
US 4,668,750 · App. 06/919,512
Flame-retardant molded composition which incorporates a poly(styrene-co-N-phenylmaleimide-co-dibromostyrene) copolymer
Inventor:
Usama E. Younes
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Oct 16, 1986
Inventor
Usama E. Younes
Assignee (at issue)
Atlantic Richfield Company
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.