Granted Patent
Utility
US 6,569,300 · App. 09/504,257
Steel-clad cathode for electrolytic refining of copper
Inventor:
William Assenmacher
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Feb 15, 2000
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.