Granted Patent
Utility
US 5,699,825 · App. 08/557,453
Double seat flow control valve
Inventor:
Larry A. Norton
Patented Case
View Patent ↗
Granted: Dec 23, 1997
Filed: Nov 14, 1995
Inventor
Larry A. Norton
Assignee (at issue)
United Dominion 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.