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:
Nov. 28, 2006
Filed:
Feb. 13, 2002
Stein Julsrud, Skien, NO;
Turid Risdal, Porsgrunn, NO;
Stein Julsrud, Skien, NO;
Turid Risdal, Porsgrunn, NO;
Norsk Hydro ASA, Oslo, NO;
Abstract
A material suitable for use as the active anode surface in the electrolytic reduction of alumina to aluminium metal defined by the formula: ABCOwhere A is a divalent cation or a mixture of cations with a relative preference for octahedral coordination, B is a trivalent cation or mixture of cations with a relative preference for tetrahedral coordination, C is a trivalent cations with a relative preference for octahedral coordination or a four-valent cation with a relative preference for octahedral coordination, O is the element oxygen: When C is trivalent x=0, 0.8<d<1, δ<0.2 and x+d+d is essentially equal to 1. When C is four-valent 0.4<x<0.6, 0.4<d<0.6, δ<0.2 and x+d+δ is essentially equal to 1.