Fluid composition suitable for the production and preparation of ion exchange membranes
CA 2380098 A1 · Owner: David Fuel Cell Components, S.L. · Inventors: Blach Vizoso, Ricardo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fluid composition containing ion exchange copolymer which is perfluorated with functional groups -SO3M, M-hydrogen ions or ions of alkaline metals (EM higher than 900) and a polar organic solvent or a mixture of a polar organic solvent and a non polar solvent and, as perfluorated ion exchange copolymer the , composition contains a perfluorated ion exchange copolymer having a crystallinity grade from 2 to 10 % and a ratio between the density of the indicated ion exchange copolymer and the density of the original perfluorated copolymer in non ionic form between 0.9 and 0.97. The proportion of the components is in % by weight: perfluorated ion exchange copolymer 1-35; polar organic …
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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 27, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 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
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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.