Positive electrode and non-aqueous electrolyte cell
CA 2344981 C · Owner: Yamada, Atsuo · Inventors: Yamada, Atsuo; Yamahira, Takayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lithium ion cell less costly than a control lithium ion cell is provided. The , lithium ion cell is improved appreciably in operational stability under special , conditions, such as high temperatures and exhibits superior characteristics against , over-discharging, while guaranteeing compatibility to the operating voltage of a , conventional lithium ion cell and an energy density equivalent to that of the conventional lithium ion cell. To this end the lithium ion cell includes a , positive electrode, a negative electrode and a non-aqueous electrolyte and uses, as a , positive electrode active material a composite material of a first lithium compound represented by the general …
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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 April 25, 2001 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 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.