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Expired Canadian patentCanada

Method of producing oxide superconducting wire and oxide superconducting wire produced by this method

CA 1338753 C · Owner: Fujikura Ltd. · Inventors: Nakagawa, Mikio; Sugimoto, Masaru; Kohno, Osamu

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Abstract From the Canadian patent

A method of producing an oxide superconducing wire. A non-oxidizing metal layer is formed between an oxide superconducting material and an oxidizing metal support in order to prevent oxygen from being taken away from the oxide superconducting material by the oxidizing metal support during a subsequent heat treatment for producing an oxide superconductor to thereby obtaining a wire composite. The wire composite is then heated to produce the oxide superconductor.

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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 December 3, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 21, 1988
GrantedDecember 3, 1996
Term endedDecember 3, 2013
Patent numberCA 1338753 C
Classification (IPC)H01B12/00 +2 more

Timeline

Timeline From CIPO dates

198919921995199820012004200720102013Application filedMarch 21, 1988Patent grantedDec 3, 1996Term endedDec 3, 2013

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.