Granted Patent
Utility
US 6,368,489 · App. 09/648,506
Copper electrowinning
Inventors:
Kenneth L. Hardee, Lynne M. Ernes, Carl W. Brown, Jr.
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Aug 25, 2000
Inventors
Kenneth L. Hardee
Lynne M. Ernes
Carl W. Brown, Jr.
Assignee (at issue)
Eltech Systems 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.