Granted Patent
Utility
US 5,618,445 · App. 08/504,985
Septic tank solids retainer gas baffle
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Jul 20, 1995
Inventor
Norman W. Gavin
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.