Electrolytic solution for electrolytic capacitor and electrolytic capacitor using the same
CA 2291359 C · Owner: Rubycon Corporation · Inventors: Komatsu, Akihiko; Ogawara, Tetsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrolytic solution for an electrolytic capacitor which comprises (1) a solvent made up of 20 to 80% by weight of an organic solvent and 80 to 20% by weight of water (2) at least one electrolyte selected from the group consisting of carboxylic acids salts of carboxylic acids, inorganic acids and salts of inorganic acids, and (3) a chelate compound. Preferably an organic acid or salt thereof and an inorganic acid or salt thereof are used in combination. The chelate compound may be selected from the group consisting of ethylenediamine-N,N,N',N'-tetraacetic acid trans-1,2-diaminocyclohexane-N,N,N',N'-tetraacetic acid monohydrate N,N-bis(2-hydroxyethyl)glycine, …
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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 30, 1999 and granted November 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2021.
- 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.