Granted Patent
Utility
US 4,267,029 · App. 06/109,959
Anode for high resistivity cathodic protection systems
Inventor:
Philip M. Massarsky
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jan 7, 1980
Inventor
Philip M. Massarsky
Assignee (at issue)
Pennwalt Corporation
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.