Granted Patent
Utility
US 4,853,002 · App. 07/181,828
Process for removing hydrogen sulfide from waste water
Inventors:
Joseph L. Niedzwiecki, Ralph G. Wolfe
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Apr 15, 1988
Inventors
Joseph L. Niedzwiecki
Ralph G. Wolfe
Assignee (at issue)
Exxon Research and Engineering 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.