Alkali/transition metal phosphates and related electrode active materials
CA 2721206 C · Owner: Valence Technology, Inc. · Inventors: Swoyer, Jeffrey L.; Saidi, M. Yazid; Barker, Jeremy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrode active material comprising a compound of the formula A a+x M b P1-x Six O4 wherein (a) A is selected from the group consisting of Li Na, K, and mixtures thereof, where 0 < a < 1 and 0 <= x <= 1; (b) M is M1e M2f M3g wherein: a. M1 is a +2 oxidation state transition metal where e > 0; b. M2 is a +2 oxidation state non- transition metal where f > 0; c. M3 is a +3 oxidation state non-transition metal where g > 0; and d. e + f + g = b.
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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 March 5, 2003 and granted May 22, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2025.
- 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.