Nonaqueous electrolytes
CA 2072488 C · Owner: Eveready Battery Company, Inc. · Inventors: Webber, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nonaqueous electrolyte for use in, electrochemical cells in which the electrolyte comprises a solute, such as LiCF3SO3, dissolved in a mixture of a dioxolane-based solvent, such as dioxolane, and an acyclic ether solvent such as, dimethoxyethane, and wherein the weight ratio of the dioxolane-based solvent to the acyclic ether solvent is less than 45:55 and the volume ratio of the dioxolane-based solvent o the acyclic ether solvent is less than 40:60.
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 June 26, 1992 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2014.
- 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.