Patents by Inventor Atsushi Tomotake

Atsushi Tomotake has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Silver halide color photographic light-sensitive material containing amide type couplers
    Patent number: 5100773
    Abstract: There is disclosed the silver halide light-sensitive color photographic material having an excellent dispersing stability in a silver halide emulsion, a satisfactory color formability and a sufficient maximum color density, and capable of providing a high reactivity or a high quality image, wherein the photographic material contains at least one selected from the couplers represented by Formulas I and II: ##STR1##
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: March 31, 1992
    Assignee: Konica Corporation
    Inventors: Atsushi Tomotake, Shuji Kida, Mayumi Tomotake, Fumio Ishii
  • Silver halide photographic light-sensitive material containing a novel yellow coupler
    Patent number: 5066574
    Abstract: A silver halide photographic light-sensitive material which contains a noble 2-equivalent yellow coupler having an excellent color forming property and an improved dispersion stability in emulsion is disclosed.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: November 19, 1991
    Assignee: Konica Corporation
    Inventors: Toru Kubota, Mayumi Tomotake, Hidenobu Ohya, Atsushi Tomotake, Noboru Mizukura
  • Silver halide light-sensitive photographic material
    Patent number: 5063148
    Abstract: A silver halide light-sensitive photographic material which is capable to form magenta dye image of substantially improved light-fastness and to form non-colored portion free from Y-stain is disclosed. The material comprises compounds represented by general formula M-I and II in the layers separately or together.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: November 5, 1991
    Assignee: Konica Corporation
    Inventors: Shuichi Sugita, Noboru Mizukura, Junichi Kohno, Kenzi Kadokura, Atsushi Tomotake
  • Silver halide color photographic light-sensitive material
    Patent number: 4994361
    Abstract: A silver halide color photographic light-sensitive material is disclosed in which a novel yellow coupler represented by the following Formula I is contained. ##STR1## wherein R.sub.1 is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; R.sub.2 and R.sub.3 are each a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; X is a hydrogen atom, a halogen atom, an alkoxy group or an alkylamino group; Y, B.sub.1 and B.sub.2 are each a substituent; and m and n are each an integer of zero to 3.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: February 19, 1991
    Assignee: Konica Corporation
    Inventors: Atsushi Tomotake, Shuji Kida, Mayumi Tomotake, Fumio Ishii