Novel carbonate compounds, non-aqueous electrolytic solutions and batteries comprising non-aqueous electrolytic solutions
CA 2103298 C · Owner: Sony Corporation · Inventors: Yokoyama, Keiichi; Hiwara, Akio; Fujita, Shigeru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel carbonate compound represented by the general formula I:, R1CH2O-CO-OCH2R2 I, wherein R1 represents a hydrogen atom an alkyl group or an, alkyl group substituted with one or more halogen atoms and R2, represent an alkyl group having no hydrogen atom at the .alpha.-position thereof or an alkyl group substituted with one or more halogen atoms having no hydrogen atom at the .alpha.-position thereof, with the proviso that R1 is not identical to R2 which, has excellent properties as solvent is disclosed. A non-aqueous, electrolytic solution and a battery utilizing the novel carbonate compound are also disclosed.
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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 November 17, 1993 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2015.
- 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
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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.