Granted Patent
Utility
US 4,846,961 · App. 07/139,618
Hydroprocessing catalyst with a Ni-P-Mo
Inventors:
Paul R. Robinson, Howard D. Simpson
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Dec 30, 1987
Inventors
Paul R. Robinson
Howard D. Simpson
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.