IP Library › Granted Patent US 5,947,152
Granted Patent Utility
US 5,947,152 · App. 09/009,212

Check valve and backflow preventer

Inventors: James F. Martin, Leo W. Fleury, Jr., Gregory Michael Fuchs
Patented Case View Patent ↗
Granted: Sep 7, 1999 Filed: Jan 20, 1998
Inventors
James F. Martin
Leo W. Fleury, Jr.
Gregory Michael Fuchs
Assignee (at issue)
Grinnell 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,947,152
App. No.
09/009,212
Filed
1998-01-20
Granted
1999-09-07
Kind
A