Granted Patent
Utility
US 6,669,828 · App. 09/927,227
Cathode for electrolysis cells
Inventor:
Elke Fritz-Langhals
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Aug 10, 2001
Inventor
Elke Fritz-Langhals
Assignee (at issue)
Consortium für elektrochemische Industrie GmbH
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.