Granted Patent
Utility
US 4,282,102 · App. 06/098,693
Activated sludge wastewater treatment having suspended inert media for biota growth
Inventor:
Thomas C. Rooney
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Nov 29, 1979
Inventor
Thomas C. Rooney
Assignee (at issue)
REXNORD GMBH
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.