Granted Patent
Utility
US 6,096,933 · App. 09/039,041
Hydrocarbon hydrogenation and catalyst therefor
Inventors:
Tin-Tack Peter Cheung, Marvin M. Johnson
Patented Case
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Granted: Aug 1, 2000
Filed: Mar 13, 1998
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.