Granted Patent
Utility
US 4,253,972 · App. 06/080,765
Flame retardant polyolefins
Inventor:
Clifton T. Fleenor, Jr.
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Oct 1, 1979
Inventor
Clifton T. Fleenor, Jr.
Assignee (at issue)
BorgWarner 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.