Positive plate material and cell comprising it
CA 2431948 C · Owner: Sony Corporation · Inventors: Li, Guohua
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided are a cathode material capable of achieving a higher discharge capacity and a higher discharge voltage and obtaining superior , charge-discharge characteristics and a battery using the cathode material. A separator (15) is disposed between a cathode (12) and an anode (14). The cathode (12) comprises a lithium composite oxide represented by Li a MI b MII c O d. MI represents at least two kinds selected from the group consisting of Mn, Ni and Co, and MII represents at least one kind selected from the group consisting of Al, Ti, Mg and B. Further a, b, c and d are , within a range satisfying 1.0<a<1.5 0.9<b+c<1.1, a>b+c, 1.8<d<2.5, respectively. When lithium is excessively …
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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 8, 2002 and granted January 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2024.
- 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.