Granted Patent
Utility
US 5,649,591 · App. 08/621,337
Radiator cap with sacrificial anode
Inventor:
Michael Green
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Mar 25, 1996
Inventor
Michael Green
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.