Granted Patent
Utility
US 4,258,160 · App. 06/027,553
Process for polymerizing butadiene
Inventor:
Adel Farhan Halasa
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Apr 6, 1979
Inventor
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.