Granted Patent
Utility
US 5,153,271 · App. 07/794,082
Diene polymers and copolymers terminated by reaction with aromatic nitriles
Inventors:
David F. Lawson, Mark L. Stayer, Jr., Thomas A. Antkowiak
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Nov 18, 1991
Inventors
David F. Lawson
Mark L. Stayer, Jr.
Thomas A. Antkowiak
Assignee (at issue)
Bridgestone Firestone
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.