Granted Patent
Utility
US 4,477,612 · App. 06/461,345
Lignin reinforced synthetic rubber
Inventor:
Stephen P. Boutsicaris
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Jan 27, 1983
Inventor
Stephen P. Boutsicaris
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.