Granted Patent
Utility
US 4,431,765 · App. 06/217,624
Free flowing polybutadiene resin particles and process for the preparation thereof
Inventors:
John M. Doshak, Mark R. Roodvoets, Adel Farhan Halasa
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Dec 18, 1980
Inventors
John M. Doshak
Mark R. Roodvoets
Adel Farhan Halasa
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.