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:
Jan. 04, 2005
Filed:
Jan. 25, 2002
Applicants:
Robert J. Barnett, Goldendale, WA (US);
Michael B. Mezner, Sandy, OR (US);
Donald R Bradford, Underwood, WA (US);
Inventors:
Robert J. Barnett, Goldendale, WA (US);
Michael B. Mezner, Sandy, OR (US);
Donald R Bradford, Underwood, WA (US);
Assignee:
Northwest Aluminum Technologies, Seattle, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25C 322 ;
U.S. Cl.
CPC ...
Abstract
A method of maintaining molten salt concentration in a low temperature electrolytic cell used for production of aluminum from alumina dissolved in a molten salt electrolyte contained in a cell free of frozen crust wherein volatile material is vented from the cell and contacted and captured on alumina being added to the cell. The captured volatile material is returned with alumina to cell to maintain the concentration of the molten salt.