The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2004
Filed:
Apr. 22, 2002
Applicant:
Inventor:
Craig W. Brown, The Dalles, OR (US);
Assignee:
Northwest Aluminum Technologies, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25C 3/06 ; C25C 3/08 ; C25C 3/12 ; B25D 5/940 ;
U.S. Cl.
CPC ...
C25C 3/06 ; C25C 3/08 ; C25C 3/12 ; B25D 5/940 ;
Abstract
A method of producing aluminum in an electrolytic cell comprising the steps of providing an anode in a cell, preferably a non-reactive anode, and also providing a cathode in the cell, the cathode comprised of a base material having low electrical conductivity reactive with molten aluminum to provide a highly electrically conductive layer on the base material. Electric current is passed from the anode to the cathode and alumina is reduced and aluminum is deposited at the cathode. The cathode base material is selected from boron carbide, and zirconium oxide.