Granted Patent
Utility
US 4,154,913 · App. 05/805,435
Amine terminated polymers and the formation of blocked copolymers
Inventors:
William L. Hergenrother, Richard A. Schwarz, Richard J. Ambrose, Robert A. Hayes
Patented Case
View Patent ↗
Granted: May 15, 1979
Filed: Jun 10, 1977
Inventors
William L. Hergenrother
Richard A. Schwarz
Richard J. Ambrose
Robert A. Hayes
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.