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Expired Canadian patentCanada

Phosphor, radiation image recording and reproducing method and radiation image storage panel employing the same

CA 1234970 A · Owner: Fuji Photo Film Co. Ltd. · Inventors: Nakamura, Takashi; Takahashi, Kenji

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Abstract From the Canadian patent

A divalent europium activated complex halide phosphor having the formula (I):, MIIFX?aMIX':xEu2+ (I) in which MII is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M is at least one alkali metal selected from the group consisting of Rb and Cs; X is at least one halogen selected from the group consisting of C?, Br and I; X' is at least one halogen selected from the group consisting of F C?, Br, and I; and a and x are numbers satisfying the conditions of 0 < a ? 4.0 and 0 < x ? 0.2, respectively. A process for the preparation of said phosphor, a radiation image recording and reproducing method utilizing said phosphor and a radiation image storage panel …

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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 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 6, 1984
GrantedApril 12, 1988
Term endedApril 12, 2005
Patent numberCA 1234970 A
Classification (IPC)G21K4/00 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedNov 6, 1984Patent grantedApril 12, 1988Term endedApril 12, 2005

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