Nonaqueous organic electrolytes for low temperature discharge of rechargeable electrochemical cells
CA 2334054 A1 · Owner: Gan, Hong · Inventors: Takeuchi, Esther S.; Gan, Hong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alkali metal secondary electrochemical cell and, preferably a lithium ion cell, activated with an equilibrated quaternary solvent system is described. The solvent system comprises a mixture of dialkyl carbonates and cyclic carbonates, and preferably a quaternary mixture of dimethyl carbonate diethyl, carbonate, ethylmethyl carbonate and ethylene carbonate with dimethyl carbonate, diethyl carbonate and ethylmethyl carbonate in an equilibrated ratio. Lithium ion cells activated with this electrolyte have good room temperature cycling characteristics and excellent low temperature discharge behavior.
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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 February 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 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.