Fastening structure for fuel cell
CA 2262189 C · Owner: Yamagami, Takeshi · Inventors: Yamagami, Takeshi; Komura, Takashi; Okazaki, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fuel cell stack has a plurality of fuel cells separators sandwiching each of the fuel cells and first and second end plates disposed on respective opposite ends of the plurality of fuel cells. A fastening structure incorporated in the fuel cell stack has a liquid chamber disposed on an outer surface of the first end plate a silicone oil filled in the liquid chamber and a pressurizing mechanism disposed on an outer surface of the second end plate for pressing the fuel cells toward the first end plate. The plurality of fuel cells is given a uniform surface pressure and can be reduced in weight and made compact.
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 February 16, 1999 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2021.
- 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.