Granted Patent
Utility
US 4,383,071 · App. 06/260,477
Flame and smoke retardant elastomers formed by grafting vinylidene chloride on diene/butyl acrylate copolymers
Inventors:
David F. Lawson, Robert A. Hayes, Alan G. Altenau
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: May 4, 1981
Inventors
David F. Lawson
Robert A. Hayes
Alan G. Altenau
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.