Bipolar plates for fuel cell stacks
CA 2365337 A1 · Owner: Sgl Carbon Ag · Inventors: Yamamoto, Tetsu; Trapp, Victor; Hengl, Ruediger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to bipolar plates for electrochemical cells particularly low-temperature fuel, cells with surface modification to enhance through-plate conductivity processes for improving, the surface properties of those bipolar plates and fuel cell assemblies made , with such plates. Graphite-polymer composite bipolar plates with high bulk conductivity are subjected to an, abrasive surface treatment to improve the surface contact as well as the reactant transfer to the, adjacent gas diffusion electrodes.
Read the whole patent
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 December 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2023.
- 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.