Granted Patent
Utility
US 4,723,567 · App. 06/944,590
Gas flow control valve
Inventors:
James R. Phlipot, Steve R. Pinkston, Harry Nurre
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Dec 22, 1986
Inventors
James R. Phlipot
Steve R. Pinkston
Harry Nurre
Assignee (at issue)
Essex Industries, 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.