Granted Patent
Utility
US 4,447,317 · App. 06/491,896
Hydroprocessing with lithium-containing catalyst
Inventors:
J. W. Randolph Miller, Howard D. Simpson
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: May 5, 1983
Inventors
J. W. Randolph Miller
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.