Granted Patent
Utility
US 6,805,723 · App. 10/382,972
Method and reactor for production of aluminum by carbothermic reduction of alumina
Inventors:
Jan A. Aune, Kai Johansen
Patented Case
View Patent ↗
Granted: Oct 19, 2004
Filed: Mar 6, 2003
Inventors
Jan A. Aune
Kai Johansen
Assignees (at issue)
ALCOA INC.
ELKEM ASA
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.