Granted Patent
Utility
US 4,289,608 · App. 05/967,225
Process for catalytically cracking metals-containing hydrocarbon feedstocks
Inventor:
Dennis P. McArthur
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Dec 7, 1978
Inventor
Dennis P. McArthur
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.