Granted Patent
Utility
US 4,356,286 · App. 06/246,838
Thermoplastic elastomer blends of a nitrile rubber and a crystalline polyamide mixture
Inventors:
Tristram W. Bethea, Shingo Futamura
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Mar 23, 1981
Inventors
Tristram W. Bethea
Shingo Futamura
Assignee (at issue)
The Firestone Tire & Rubber 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.