Activated carbon material, and production method and use thereof
CA 2453968 A1 · Owner: Showa Denko K.K. · Inventors: Saito, Yasuo; Tanaka, Masako
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing an activated carbon which comprises a step of , subjecting a coal-based pitch to the heat treatment in two stages having temperatures of 400 to 600~C and 600 to 900~C respectively, and a step of , admixing the resulting a carbonaceous material with an alkali metal compound and activating it at a temperature of 600 to 900~C; and an activated carbon produced by the method. The addition of a fibrous material to a coal-based pitch in the activation step inhibits the expansion of an alkali molten fluid which leads to marked improvement of the productivity of activated carbon. The activated carbon can be used as a material of a polarizable electrode for an electric …
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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 September 9, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 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.