Polymer electrolyte fuel cell
CA 2591446 C · Owner: Ohma, Atsushi · Inventors: Yamamoto, Shinji; Ohma, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solid polymer type fuel cell, which has a solid polymer electrolyte membrane, catalyst , layers arranged on both sides of the solid polymer electrolyte membrane gas , diffusion , layers disposed outside of the catalyst layers and separators arranged on the , outside of the gas diffusion layer. The cathode side catalyst layer comprises a carbon carrier , comprising a carbon black, the carbon carrier has a mean lattice plane spacing d002 of , 002 planes calculated from an X-ray diffraction within a range of 0.343 nm to 0.358 nm, a crystallite size Lc within a range of 3 nm to 10 nm and a specific surface , area within a range of 200 m2/g to 300 m2/g. The carbon black has a mean …
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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 1, 2005 and granted March 18, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.