Granted Patent
Utility
US 5,972,220 · App. 09/089,886
Pre-thickened aerobic digester system
Inventor:
Elena Bailey
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jun 3, 1998
Inventor
Elena Bailey
Assignee (at issue)
Enviroquip 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.