Granted Patent
Utility
US 3,951,389 · App. 05/532,937
Elastomer processing method
Inventor:
John Porter
Patented Case
View Patent ↗
Granted: Apr 20, 1976
Filed: Dec 16, 1974
Inventor
John Porter
Assignee (at issue)
B. F. Goodrich 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.