Granted Patent
Utility
US 4,237,263 · App. 06/040,802
Poly(monoalkyl group containing organophosphazenes) and method for their preparation
Inventors:
Harry R. Allcock, Robert J. Ritchie
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: May 21, 1979
Inventors
Harry R. Allcock
Robert J. Ritchie
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.