Granted Patent
Utility
US 6,206,023 · App. 09/560,413
Ball valve including seat retainer securing means and method for forming the same
Inventor:
Larry J. Landers
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Apr 27, 2000
Inventor
Larry J. Landers
Assignee (at issue)
Nordstrom Valves, 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.