Metal electrodes for electrochemical processes
CA 2030669 C · Owner: Chemetics International Company Ltd. · Inventors: Alford, Raymond E.; Warren, Ian H. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal electrodes provided with a coating consisting essentially of a mixed oxide compound of (i) a compound of the general formula ABO4, having a structure of the rutile-type, where A is an element in the trivalent state selected from the group consisting of Al Rh and Cr, and B is, an element in the pentavalent state selected from the group consisting of Sb and Ta, (ii) RuO2 and (iii) TiO2; wherein the mole fraction of ABO4 is between 0.01 and 0.42 the mole, fraction of RuO2 is between 0.03 and 0.42 and the mole, fraction of TiO2 is between 0.55 and 0.96. The electrodes have low precious metal content, provide improved durability and improved current efficiency-anodic overvoltage …
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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 November 22, 1990 and granted June 29, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.