Granted Patent
Utility
US 4,237,245 · App. 06/068,308
Hydrogenated block copolymers of butadiene containing a block of 1,4 and a block of 1,2-microstructure
Inventors:
Adel Farhan Halasa, David W. Carlson, James E. Hall
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Aug 20, 1979
Inventors
Adel Farhan Halasa
David 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.