Granted Patent
Utility
US 4,839,428 · App. 07/232,341
Method for improving green strength properties of vulcanizable rubber compositions
Inventor:
James A. Davis
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Aug 15, 1988
Inventor
James A. Davis
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.