Granted Patent
Utility
US 6,260,530 · App. 09/442,374
Vortex-inducing valve seat insert
Inventor:
Joseph J. Keon, Jr.
Patented Case
View Patent ↗
Granted: Jul 17, 2001
Filed: Nov 17, 1999
Inventor
Joseph J. Keon, Jr.
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.