Ceramic conductor pre-treated by oxidising for a zinc anode
CA 2517830 C · Owner: S.C.P.S. Societe De Conseil Et De Prospective Scientifique S.A. · Inventors: Bugnet, Bernard; Rouget, Robert; Doniat, Denis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an additive to the active mass of a zinc anode for an alkaline secondary electrochemical generator. Said additive contains conductive ceramic powder preferably titanium nitride particles which is exposed to an oxidation pre-treatment prior to the incorporation thereof into the active mass of the anode. Said ceramic powder is used as electronic conduction in the anode active mass and as zincates retention which are produced by generator discharge. In order to use said retentive capacity the powder is exposed to an oxidation pre-treatment whereby making it possible to form the binding sites on the surface of ceramic grains. The inventive additive makes it possible …
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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 July 25, 2003 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2025.
- 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.