An improved process for making a lithiated lithium manganese oxide spinel
CA 2221738 C · Owner: Bowden, William L. · Inventors: Kallmes, Andrew; Wang, Enoch; Bowden, William L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for making a lithiated lithium manganese oxide spinet of the formula: Li(1+x)Mn2O4 comprising contacting a lithium manganese oxide spinet of the formula: LiMn2O4 with a lithium carboxylate compound, at a temperature and for a time sufficient to decompose the carboxylate compound and free the lithium to form said lithiated spinel.
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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 June 5, 1996 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 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.