Granted Patent
Utility
US 6,436,272 · App. 09/678,238
Low temperature aluminum reduction cell using hollow cathode
Inventors:
Craig W. Brown, Patrick B. Frizzle
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Oct 4, 2000
Inventors
Craig W. Brown
Patrick B. Frizzle
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.