Granted Patent
Utility
US 4,243,648 · App. 06/050,170
Method for removing hydrogen sulfide from gas streams
Inventor:
Donald M. Fenton
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Jun 20, 1979
Inventor
Donald M. Fenton
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.