Granted Patent
Utility
US 6,129,837 · App. 09/187,765
Waste water treatment filter including a waste water level control alert device
Inventor:
Harry L. Nurse, Jr.
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Nov 6, 1998
Inventor
Harry L. Nurse, Jr.
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.