Separator for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
CA 2356033 C · Owner: Takahashi, Tsutomu · Inventors: Nishida, Yasunori; Shinohara, Yasuo; Takahashi, Tsutomu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A separator for non-aqueous electrolyte secondary battery wherein the separator comprises a shut-down layer a heat-resistant microporous layer, and a spacer having a form of particles fibers, net or porous film on the surface of the heat-resistant microporous layer. The separator has a shut-down function heat-resistance and excellent electrochemical oxidation resistance and a battery having improved safety can be produced.
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 28, 2001 and granted September 13, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2023.
- 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.