Granted Patent
Utility
US 4,374,952 · App. 06/168,874
Nitrile rubber/EPDM graft blends
Inventors:
Charles D. Shedd, Allen L. Stone
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Jul 14, 1980
Inventors
Charles D. Shedd
Allen L. Stone
Assignee (at issue)
Uniroyal Ltd.
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.