Granted Patent
Utility
US 4,609,724 · App. 06/730,410
Process for preparing and purifying alkoxyphosphazene polymer
Inventors:
Robert Elefritz, William M. Cole, Charles R. Johnson
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Apr 29, 1985
Inventors
Robert Elefritz
William M. Cole
Charles R. Johnson
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.