Electrolytic capacitor and method for producing the same
CA 2076947 A1 · Owner: Takeyama, Kenichi · Inventors: Sotomura, Tadashi; Kanbara, Teruhisa; Tsubaki, Yuichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrolyte of electrolytic capacitor comprises at least one ammonium salt and at least one polyether polyol having a skeletal structure represented by the formula:, where, each of Rs independently represents a hydrogen atom, an optionally substituted isocyanate residue or acrylic residue which may be the same as or different from e another; m1, m2, m3, n1, n2 and n3 each represent a positive integer, and the ends of the isocyanate residues or the acrylic residues are 3-dimensionally linked. 34
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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 August 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.