Novel battery and method for producing the same
CA 2226366 C · Owner: Yamashita, Masaya · Inventors: Oki, Shunsuke; Yamashita, Masaya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a battery comprising a positive electrode comprising a cathode active material layer a, negative electrode comprising an anode active material layer, and a porous separator disposed between the positive electrode and the negative electrode wherein, the positive electrode, the negative electrode and the separator are disposed in a casing containing an electrolyte, and wherein the porous separator comprises at least one layer of an aggregate form of particles of at least one insulating substance, the layer of the aggregate form of particles having a three-dimensional network of voids which function as pores of the porous separator and which are capable of passing ions …
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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 28, 1996 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2018.
- 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.