Asbestos-free diaphragm, comprising non-fibrous mineral particles, combination comprising same, method for obtaining same and use thereof
CA 2396047 A1 · Owner: Chloralp · Inventors: Le Helloco, Jean-Guy; Perineau, Jean-Maurice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a microporous diaphragm obtainable by filtering through a porous support an aqueous dispersion free of asbestos fibres and titanate fibres comprising organic fibres, at least a binding agent selected among halogenated polymers at least a pore-forming agent and mineral particles with non-fibrous structure. The invention also concerns a combination comprising said diaphragm and a fibrous mat obtainable by filtration deposit through a porous support of a dispersion comprising fibres whereof part is electrically conductive at least a binding agent selected among halogenated polymers at least an electrolytic agent, at least a pore-forming agent. The invention further …
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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 December 28, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2022.
- 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.