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Expired Canadian patentCanada

Heat transfer sheet for color image formation

CA 1295439 C · Owner: Kanto, Jumpei · Inventors: Kutsukake, Masaki; Kanto, Jumpei

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention concerns a heat transfer sheet for color image formation to be used for heat-sensitive transfer recording such as by thermal printer and, concerns a heat transfer sheet for color image formation having dye carrying layers having respective hues of cyan, magenta and yellow formed on a substrate sheet. Its specific features reside in that the respective dye carrying layers each contain one kind or plural kinds of dyes and that the color characteristics of the respective dye carrying layers have values within specific ranges of hue error and turbidity. The heat transfer sheet for color image formation of the present invention having such dye carrying layers provided is excellent …

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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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.
FiledSeptember 25, 1987
GrantedFebruary 11, 1992
Term endedFebruary 11, 2009
Patent numberCA 1295439 C
Classification (IPC)B41M5/26

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 25, 1987Patent grantedFeb 11, 1992Term endedFeb 11, 2009

Sources & verification

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