Granted Patent
Utility
US 5,310,485 · App. 07/953,853
Process for dissolved gas flotation in anaerobic wastewater treatment
Inventor:
Mel Roshanravan
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Sep 30, 1992
Inventor
Mel Roshanravan
Assignee (at issue)
Darling-Delaware Company, 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.