Granted Patent
Utility
US 6,465,391 · App. 09/643,266
Selective hydrogenation catalyst and processes therefor and therewith
Inventors:
Tin-Tack Peter Cheung, Marvin M. Johnson
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Aug 22, 2000
Inventors
Tin-Tack Peter Cheung
Marvin M. Johnson
Assignee (at issue)
Phillips Petroleum Company
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.