Granted Patent
Utility
US 4,463,155 · App. 06/377,742
Polyether polyurethane elastomers
Inventor:
Richard W. Kibler
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: May 13, 1982
Inventor
Richard W. Kibler
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.