Granted Patent
Utility
US 6,485,628 · App. 09/721,836
Bath for electrolytic reduction of alumina and method therefor
Inventors:
Craig W. Brown, Richard J. Brooks, Patrick B. Frizzle, Drago D. Juric
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Nov 25, 2000
Inventors
Craig W. Brown
Richard J. Brooks
Patrick B. Frizzle
Drago D. Juric
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.