Granted Patent
Utility
US 6,551,516 · App. 09/698,928
Methods for removing grit and grease from water
Inventor:
William Earl Castleberry
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Oct 27, 2000
Inventor
William Earl Castleberry
Assignee (at issue)
SCHREIBER 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.