Polymer electrolyte material, polymer electrolyte part, membrane electrode assembly, and polymer electrolyte type fuel cell
CA 2576887 C · Owner: Nakamura, Masataka · Inventors: Nakamura, Masataka; Izuhara, Daisuke; Adachi, Shinya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a polymer electrolyte material which has a fraction Rw of non-freezing water shown by the equation (S1) below of 75 to 100% , by weight, and an ionic group, and the polymer electrolyte material is in a moisture , state formed by immersing the polymer electrolyte material for 12 hours in 1 to 30% , by weight methanol aqueous solution at 40 to 80°C and then for 24 hours in pure , water at 20°C, wherein, Rw = Wnf / (Wfc+Wnf) x 100 (S1).
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 August 30, 2005 and granted April 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.