Granted Patent
Utility
US 6,627,062 · App. 09/890,606
Graphite cathode for the electrolysis of aluminium
Inventor:
Jean-Michel Dreyfus
Patented Case
View Patent ↗
Granted: Sep 30, 2003
Filed: Oct 5, 2001
Inventor
Jean-Michel Dreyfus
Assignee (at issue)
Carbone Savoie
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.