Aluminium production cells with iron-based metal alloy anodes
CA 2455783 A1 · Owner: Nguyen, Thinh T. · Inventors: Nguyen, Thinh T.; Duruz, Jean-Jacques; De Nora, Vittorio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An iron-based metal anode for the electrowinning of aluminium by the electrolysis of alumina in a molten fluoride electrolyte has an electrochemically active integral outside oxide layer on an iron-based alloy that consists of 75 to 90 weight % iron; 0.5 to 5 weight % in total of at least one rare earth metal, in particular yttrium; 1 to 10 weight % aluminium; 0 to 10 weight % copper; 0 to 10 weight % nickel; and 0.5 to 5 weight % of other elements. The total amount of aluminium copper and nickel is in the , range from 5 to 20 weight %; and the total amount of rare earth metal(s) aluminium and copper is also in the range from 5 to 20 weight %. The electrochemically active surface …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 2, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2024.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.