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Expired Canadian patentCanada

Soft magnetic thin film

CA 1338255 C · Owner: Katori, Kenji · Inventors: Katori, Kenji; Hayashi, Kazuhiko; Hayakawa, Masatoshi

CIPO record

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Abstract From the Canadian patent

Disclosed is a soft magnetic thin film having a basic composition of FeCoNi or FeCoDy which is specified for use as a single layer film for increasing the saturation magnetic flux density and the coercive force. The soft magnetic properties are achieved by laminating the above defined soft magnetic thin film as the first soft magnetic thin film layer with a second magnetic thin film layer. In this case, crystal structures of the first and the second soft magnetic thin films should appropreately be selected and combined.

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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 April 23, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 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.
FiledJune 22, 1988
GrantedApril 23, 1996
Term endedApril 23, 2013
Patent numberCA 1338255 C
Classification (IPC)G11B5/18 +2 more

Timeline

Timeline From CIPO dates

198919921995199820012004200720102013Application filedJune 22, 1988Patent grantedApril 23, 1996Term endedApril 23, 2013

Sources & verification

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