Granted Patent
Utility
US 5,492,609 · App. 08/326,879
Cathode for electrolytic refining of copper
Inventor:
William Assenmacher
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Oct 21, 1994
Inventor
William Assenmacher
Assignee (at issue)
T.A. Caid Industries Inc.
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.