Membrane electrode assembly having annealed polymer electrolyte membrane
CA 2403517 A1 · Owner: Hamrock, Steven J. · Inventors: Mao, Shane S.; Hamrock, Steven J.; Lewin, John L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A membrane electrode assembly (MEA) is provided which comprises an annealed polymer electrolyte membrane (PEM). Additionally the MEA may include annealed , catalyst layers annealed in contact with the annealed PEM. Additionally methods of manufacture are provided. MEA's according to the present invention may be used in an electrochemical cell such as a hydrogen fuel cell.
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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 April 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 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.