Granted Patent
Utility
US 4,226,685 · App. 06/054,924
Electrolytic treatment of plating wastes
Inventors:
Charles Portal, Glenn M. Cook
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Jul 5, 1979
Inventors
Charles Portal
Glenn M. Cook
Assignee (at issue)
Kennecott Copper 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.