Membrane electrode assembly
CA 2015782 C · Owner: Wiens, Ben I. · Inventors: Epp, Danny G.; Wiens, Ben I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A membrane electrode assembly for a fuel cell. A first and second electrode layer of porous carbon fibre paper has a solid polymer ion exchange membrane therebetween. The membrane is covered and supported by the electrode layers over substantially its entire area and the three layers are bonded together to form a single integral assembly. Sealing grooves are formed in the surfaces of the electrodes opposite the surfaces adjacent the membrane and sealant material is injected into the grooves. The sealant material also becomes integral with the assembly and acts to seal the gases provided to each of the surfaces containing the sealing grooves. Holes to accommodate the gases and water are …
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 April 30, 1990 and granted October 26, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2012.
- 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.