Granted Patent
Utility
US 4,592,812 · App. 06/664,497
Method and apparatus for electrolytic reduction of alumina
Inventors:
Theodore R. Beck, Richard J. Brooks
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Oct 25, 1984
Inventors
Theodore R. Beck
Richard J. Brooks
Assignees (at issue)
Electrochemical Technology Corp.
Brooks Rand Inc
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.