Fuel cell structure
CA 2538282 C · Owner: L'Air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'Etude Et L'Exploitation Des Procedes Georges Claude · Inventors: Claude, Eric
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 fuel cell comprising a membrane (1) and an electrode (3; 3') which is associated with a metallic current collector (5) via a fibrous gas diffusion layer (7) in which the state of the surface of the metallic collector surface in contact with the diffusion layer (7) is adapted to that of the surface of the diffusion layer typically deformed in a superficial manner by mechanical action.
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 July 21, 2004 and granted April 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 21, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 21, 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.