Polymeric Or Bis Coupler Patents (Class 430/381)
  • Patent number: 4238564
    Abstract: Recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one yellow coupler of the formula ##STR1## in which R.sub.1, R.sub.2, and R.sub.3 and R.sub.4 are alkyl, cycloalkyl or aryl, X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are radicals detachable during the coupling reaction and Y.sub.1 and Y.sub.2 are halogen, alkyl, alkoxy, alkylmercapto, --CN, --COOH, carbalkoxy, --NH.sub.2, --NHR.sub.5, --NR.sub.5 R.sub.6 or --NHCOR.sub.5, in which R.sub.5 and R.sub.6 are alkyl or phenyl, Z is a divalent bridge member and r is 1 or 2.Photographic colored images with excellent spectral absorption characteristics and good resistance to light, heat and moisture are obtained by exposing the recording material image-wise and developing.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: December 9, 1980
    Assignee: Ciba-Geigy Aktiengesellschaft
    Inventor: Mario Fryberg
  • Patent number: 4220470
    Abstract: A photographic two-equivalent magenta coupler represented by the following general formula (I): ##STR1## wherein (A) represents a residue of a magenta color image-forming coupler in which one of the hydrogen atoms in the coupling position is eliminated; Q represents an oxygen atom or NH group; and B represents the non-metallic atoms necessary to form a 5-membered or a 6-membered ring containing the nitrogen atom and the ##STR2## group. Color photographic light-sensitive materials containing the two-equivalent magenta coupler are also described.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: September 2, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Furutachi, Kotaro Nakamura, Atsuaki Arai, Minoru Yamada, Keisuke Shiba
  • Patent number: 4189321
    Abstract: A process for forming color photographic images using magenta couplers which afford excellent resistance to formalin, is described.
    Type: Grant
    Filed: August 24, 1978
    Date of Patent: February 19, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Tamotsu Kojima, Mitsuto Fujiwhara, Takaya Endo, Osamu Ezawa