Method of manufacturing a positive electrode active material of a secondary battery
CA 2331602 C · Owner: Mishina, Shinya · Inventors: Kobayashi, Naoya; Mishina, Shinya; Kawakami, Soichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A secondary battery exhibiting a long cycle life and comprising a negative electrode active material made of lithium or zinc is provided the battery at least having a negative electrode made of lithium or zinc serving as the negative electrode active material an electrolyte (electrolyte solution), a separator a positive electrode made of a positive electrode active material a collecting electrode and a battery case wherein at least the surface of the negative electrode is covered with a film having a structure which allows ions relating to the battery reactions to pass through. Since growth of dendrite of lithium or zinc at the time of the charge can be prevented short circuit between the …
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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 November 26, 1993 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2015.
- 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.