Granted Patent
Utility
US 4,568,711 · App. 06/679,656
Synergistic additive combination for guayule rubber stabilization
Inventors:
Edward L. Kay, Richard Gutierrez, Walter R. Hausch
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Dec 7, 1984
Inventors
Edward L. Kay
Richard Gutierrez
Walter R. Hausch
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.