Granted Patent
Utility
US 6,606,452 · App. 10/158,269
Hot water heater anode
Inventor:
Donald R. Caine
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: May 30, 2002
Inventor
Donald R. Caine
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.