Granted Patent
Utility
US 4,477,656 · App. 06/572,271
Method for removing sodium salts from polyphosphazene polymer solutions
Inventors:
Trent F. Longo, Vispi R. Sagar, Mark L. Stayer, Jr.
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Jan 20, 1984
Inventors
Trent F. Longo
Vispi R. Sagar
Mark L. Stayer, Jr.
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.