Granted Patent
Utility
US 4,318,789 · App. 06/202,328
Electrochemical removal of heavy metals such as chromium from dilute wastewater streams using flow through porous electrodes
Inventor:
Paul J. Marcantonio
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: Oct 30, 1980
Inventor
Paul J. Marcantonio
Assignee (at issue)
Kennecott Holdings Company
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.