Ceramic anode for oxygen evolution, method of production and use of the same
CA 2061391 C · Owner: De Nora Impianti S.P.A. · Inventors: Nidola, Antonio; De Nora, Oronzio; Nevosi, Ulderico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The anode of the invention is particularly suitable for oxygen evolution from acid solutions containing fluorides or fluorocomplex anions, used for deposition of metals. The anode is of the ceramic type consisting of tin dioxide, comprising additives to promote sinterization and increase the electrical conductivity. In a preferred embodiment of the invention the ceramic anode comprises an electrocatalytic layer for oxygen evolution comprising oxides of manganese cerium and praseodimium, suitably doped. In a particularly preferred embodiment of the present invention said anode comprises a further external layer of zirconyl phosphate .
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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 February 18, 1992 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2014.
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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.