Granted Patent
Utility
US 4,557,306 · App. 06/621,656
Carbon black-furazan oxide product and rubber compositions containing same
Inventor:
Daniel F. Graves
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Jun 18, 1984
Inventor
Daniel F. Graves
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.