Granted Patent
Utility
US 4,990,318 · App. 07/363,029
Selective removal of hydrogen sulfide over a nickel-promoted absorbing composition
Inventor:
Dennis R. Kidd
Patented Case
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Granted: Feb 5, 1991
Filed: Jun 7, 1989
Inventor
Dennis R. Kidd
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.