Granted Patent
Utility
US 5,227,431 · App. 07/684,106
Diene polymers and copolymers jumped by partial crosslinking and terminated with a substituted imine
Inventors:
David F. Lawson, Mark L. Stayer, Jr., Thomas A. Antkowiak, John R. Schreffler
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Apr 12, 1991
Inventors
David F. Lawson
Mark L. Stayer, Jr.
Thomas A. Antkowiak
John R. Schreffler
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.