Granted Patent
Utility
US 5,593,584 · App. 08/436,103
Septic tank filter
Inventor:
Harry L. Nurse, Jr.
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: May 8, 1995
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.