Granted Patent
Utility
US 3,980,606 · App. 05/552,384
Polyurethane elastomers having prolonged flex life and tires made therefrom
Inventor:
Byron H. Werner
Patented Case
View Patent ↗
Granted: Sep 14, 1976
Filed: Feb 24, 1975
Inventor
Byron H. Werner
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.