Granted Patent
Utility
US 4,331,559 · App. 06/230,982
Olefin disproportionation
Inventor:
Dennis S. Banasiak
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Feb 3, 1981
Inventor
Dennis S. Banasiak
Assignee (at issue)
Phillips Petroleum 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.