Granted Patent
Utility
US 4,308,360 · App. 06/186,965
Process for obtaining narrow molecular weight distribution in vinyl aromatic mass polymerization system
Inventor:
Richard A. Hall
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Sep 15, 1980
Inventor
Richard A. Hall
Assignee (at issue)
Standard Oil Company (Indiana)
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.