Granted Patent
Utility
US 4,248,988 · App. 06/085,847
Process for the preparation of cyclized polymeric dienes
Inventor:
Adel Farhan Halasa
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Oct 18, 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.