Granted Patent
Utility
US 5,082,571 · App. 07/698,868
Caustic sulfide wet oxidation process
Inventors:
David A. Beula, Joseph A. Momont, William M. Copa
Patented Case
View Patent ↗
Granted: Jan 21, 1992
Filed: May 13, 1991
Inventors
David A. Beula
Joseph A. Momont
William M. Copa
Assignee (at issue)
Zimpro Passavant Environmental Systems, Inc.
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.