Granted Patent
Utility
US 4,861,466 · App. 07/181,416
Pressure filter assembly with bleed valve
Inventors:
Richard A. Leoncavallo, Gregory R. Phillips, Ravinder C. Mehra
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Apr 14, 1988
Inventors
Richard A. Leoncavallo
Gregory R. Phillips
Ravinder C. Mehra
Assignee (at issue)
Nalge Company
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.