Granted Patent
Utility
US 6,800,191 · App. 10/098,141
Electrolytic cell for producing aluminum employing planar anodes
Inventors:
Robert J. Barnett, Michael B. Mezner, Donald R Bradford
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Mar 15, 2002
Inventors
Robert J. Barnett
Michael B. Mezner
Donald R Bradford
Assignee (at issue)
Northwest Aluminum Technologies
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.