Granted Patent
Utility
US 4,563,282 · App. 06/623,480
Wastewater treatment plant and method
Inventors:
John W. Wittmann, Robert C. Winkelman, Douglas F. Mooers, Richard Davie
Patented Case
View Patent ↗
Granted: Jan 7, 1986
Filed: Jun 22, 1984
Inventors
John W. Wittmann
Robert C. Winkelman
Douglas F. Mooers
Richard Davie
Assignee (at issue)
Envirex, 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.