Granted Patent
Utility
US 4,252,914 · App. 06/068,280
Thermoplastic elastomer blends of hydrogenated polybutadiene block copolymers with alpha-olefin polymers and copolymers
Inventors:
Adel Farhan Halasa, Davis W. Carlson, James E. Hall
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Aug 20, 1979
Inventors
Adel Farhan Halasa
Davis W. Carlson
James E. Hall
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.