Granted Patent
Utility
US 4,559,378 · App. 06/645,739
Stabilization of elastomers with aliphatic-phenyl diamines and aliphatic phosphite compounds
Inventors:
Edward L. Kay, Richard Gutierrez, Wendall R. Conard
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Aug 30, 1984
Inventors
Edward L. Kay
Richard Gutierrez
Wendall R. Conard
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.