Polymer electrolyte fuel cell
CA 2477358 C · Owner: Matsumoto, Toshihiro · Inventors: Matsumoto, Toshihiro; Kobayashi, Susumu; Kanbara, Teruhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymer electrolyte fuel cell is disclosed comprising a MEA-gasket assembly including a MEA having a polymer electrolyte membrane a pair of catalyst layers, and a pair of gas diffusion electrodes and a pair of gaskets provided on peripheral portions of surfaces of both sides of the MEA with gaps between the gaskets and the gas diffusion electrodes and a pair of electrically conductive separators disposed to sandwich the MEA-gasket assembly and provided with groove-shaped cell reaction gas passages on inner surfaces thereof each of the cell reaction gas passages running sequentially on a corresponding gasket of the pair of gaskets a corresponding gap of the gaps, a corresponding gas …
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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 August 10, 2004 and granted March 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2026.
- 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.