Granted Patent
Utility
US 4,883,601 · App. 07/238,752
Process for purifying an aqueous, hydrogen sulfide-scrubbing solution
Inventors:
Jeffery W. Koepke, Dennis D. Delaney
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Aug 30, 1988
Inventors
Jeffery W. Koepke
Dennis D. Delaney
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.