Separator for fuel cells
CA 2266631 A1 · Owner: Tanno, Fumio · Inventors: Hamada, Kazutoshi; Tanno, Fumio; Hagiwara, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A separator for fuel cells free of the problems inherent in the prior art which is highly electrically conductive exhibits a high gas-barrier property , and a high strength and can be easily produced. The separator comprises a molded article of an electrically conductive carbon powder and a high molecular compound, and is characterized in that the aspect ratio of the electrically conductive powder is from 4 to 60.
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 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2020.
- 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.