Granted Patent
Utility
US 4,299,619 · App. 06/125,644
Energy efficient production of aluminum by carbothermic reduction of alumina
Inventors:
C. Norman Cochran, Nancy M. Fitzgerald
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Feb 28, 1980
Inventors
C. Norman Cochran
Nancy M. Fitzgerald
Assignee (at issue)
Aluminum Company of America
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.