Granted Patent
Utility
US 4,460,707 · App. 06/453,991
Hydroprocessing catalyst and method for preparing it
Inventor:
Howard D. Simpson
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Dec 28, 1982
Inventor
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.