Granted Patent
Utility
US 4,419,271 · App. 06/084,761
Hydrocarbon conversion catalyst
Inventor:
John W. Ward
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Oct 15, 1979
Inventor
John W. Ward
Assignee (at issue)
Union Oil Company of California
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.