Membrane-electrode unit for direct methanol fuel cells and method for the production thereof
CA 2528141 C · Owner: Dziallas, Holger · Inventors: Wittpahl, Sandra; Koehler, Joachim; Dziallas, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a membrane-electrode unit for electrochemical devices, particularly for direct methanol fuel cells (DMFC) and to a method , for the production thereof. The inventive multilayered MEE's for DMFC's consist of an anode gas distributor substrate an anode catalyst layer, an , ionomer membrane a cathode catalyst layer, and of a cathode distributor substrate. The anode catalyst layer is applied to the anode gas distributor substrate, whereas the cathode catalyst layer is directly located on the membrane. This makes it possible to achieve improved output values with a simultaneous reduction in the use of precious metals.
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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 March 30, 2004 and granted May 14, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.