Granted Patent
Utility
US 6,561,440 · App. 09/992,729
Full cone spray nozzle for metal casting cooling system
Inventor:
Christy Hofherr
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Nov 14, 2001
Inventor
Christy Hofherr
Assignee (at issue)
Spraying Systems Co.
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.