Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2006-11-28
2006-11-28
Bell, Bruce F. (Department: 1746)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C204S243100, C423S594100, C423S594300, C423S595000, C423S598000, C423S594900, C205S384000, C205S385000
Reexamination Certificate
active
07141148
ABSTRACT:
A material suitable for use as the active anode surface in the electrolytic reduction of alumina to aluminium metal defined by the formula: A1+xB1+δCdO4where 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.
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patent: 2004/0245096 (2004-12-01), Julsrud et al.
Julsrud Stein
Risdal Turid
Bell Bruce F.
Norsk Hydro ASA
Wenderoth , Lind & Ponack, L.L.P.
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