Granted Patent
Utility
US 4,444,969 · App. 06/410,742
Fire retardant copolymer from bis(hydrocarbyl)vinyl phosphonate
Inventor:
Usama E. Younes
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Aug 23, 1982
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.