Method for increasing the reversible capacity of lithium transition metal oxide cathodes
CA 2114493 C · Owner: Nec Moli Energy (Canada) Limited · Inventors: Dahn, Jeffrey Raymond; Fuller, Eric Wayne; Richard, Monique Nathalie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for increasing the reversible capacity of lithium transition metal oxide materials for use as cathodes in non-aqueous lithium batteries. The method involves reduction of oxide materials of the form Li xM yO z, wherein M represents transition metals whereby oxygen is removed while still maintaining the original phase of the material. Use of the method of the invention is particularly useful for oxide materials synthesized at low temperatures and where M is Mn.
Read the whole patent
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 January 28, 1994 and granted January 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.