Electrolyte for electrolytic capacitor
CA 1294422 C · Owner: Nippon Chemi-Con Corporation · Inventors: Tsuji, Tatsunori; Yokoyama, Yutaka; Shinozaki, Fumihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrolyte for electrolytic capacitor containing within an aprotic solvent an alkyl quarternary ammonium salt of enol-form of 1,3-diketone compound as solute. An electrolyte for electrolytic capacitor according to the invention may conveniently be prepared by adding one equivalent amount of enol-form of 1,3-diketone compound to a methylene chloride solution of alkyl ammonium hydrogensulfate for reaction with subsequent addition of two equivalent amounts of alkali hydroxide. A deposit is removed from the reaction product with subsequent vacuum drying to obtain an anhydrous salt and then dissolving said anhydrous salt to an aprotic solvent until a desired conductivity is obtained for …
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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
- Granted January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
- 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.