Granted Patent
Utility
US 5,866,735 · App. 08/867,872
Hydrocarbon hydrogenation process
Inventors:
Tin-Tack Peter Cheung, Marvin M. Johnson
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jun 4, 1997
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.