Granted Patent
Utility
US 5,135,902 · App. 07/528,877
Nickel-tungsten-phosphorus catalyst
Inventors:
Dennis D. Delaney, John W. Ward
Patented Case
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Granted: Aug 4, 1992
Filed: May 25, 1990
Inventors
Dennis D. Delaney
John W. Ward
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.