Granted Patent
Utility
US 5,425,393 · App. 08/166,812
Backflow prevention and detection system
Inventor:
Jon Everett
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Dec 15, 1993
Inventor
Jon Everett
Assignee (at issue)
ZURN INDUSTRIES, LLC
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.