Granted Patent
Utility
US 4,207,403 · App. 06/030,598
Oil-free elastomeric poly(aryloxyphosphazene) copolymer foam
Inventors:
Tai C. Cheng, John W. Fieldhouse, Arthur E. Oberster, Daniel F. Graves
Patented Case
View Patent ↗
Granted: Jun 10, 1980
Filed: Apr 16, 1979
Inventors
Tai C. Cheng
John W. Fieldhouse
Arthur E. Oberster
Daniel F. Graves
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.