Granted Patent
Utility
US 4,762,813 · App. 07/028,654
Hydrocarbon conversion catalyst
Inventor:
John W. Ward
Patented Case
View Patent ↗
Granted: Aug 9, 1988
Filed: Mar 20, 1987
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.