Azo Compounds Containing Chains Of Eight Or More Carbon Atoms Not Provided For Elsewhere In This Class Patents (Class 534/DIG2)
  • Photographic element containing a coupler capable of releasing a photograpically useful group through a pyrazole group
    Patent number: 5834604
    Abstract: A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the element further comprising a photographic coupler represented by the formulaCOUP--(T.sup.1).sub.b --T.sup.2 --(T.sup.3).sub.c --PUGwherein the substituents are as defined in the specification.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: November 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: William James Begley, Frank Dino Coms, Teh-Hsuan Chen, Donald Singleton, Jr.
  • Hydrophobic cationic dyes and thermal transfer ink ribbons using the same
    Patent number: 5834600
    Abstract: Disclosed are diazahemicyanine hydrophobic cationic dyes represented by the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are lower alkyl groups having not more than 5 carbon atoms, R.sup.5 is a lower alkyl group having not more than 5 carbon atoms or a lower alkoxy lower alkyl group having not more than 6 carbon atoms, and Z.sup.- is a counter ion having a hydrophobic organic group,and a thermal transfer ink ribbon having a substrate and and ink layer laminated thereon containing said cationic dye.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: November 10, 1998
    Assignees: Sony Corporation, Hodogaya Chemical Co., Ltd.
    Inventors: Masanobu Hida, Kengo Ito, Yoshio Fujiwara, Nobuo Suzuki, Hiroyoshi Yamaga, Junichi Hagiwara