Patents by Inventor Shinji Yoshimoto

Shinji Yoshimoto 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 photographic sensitive material
    Patent number: 4994360
    Abstract: A silver halide photographic material comprising a pyrazolotriazole coupler represented by the following Formula I and a stabilizer represented by the following Formula VIII. ##STR1## The substituents are as defined in the specification.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: February 19, 1991
    Assignee: Konica Corporation
    Inventors: Shinji Yoshimoto, Satoshi Nakagawa, Yutaka Kaneko, Shuichi Sugita
  • Silver halide photographic material
    Patent number: 4839264
    Abstract: A silver halide photographic material containing at least one of couplers represented by the general formula [I] and at least one of the compounds represented by the general formula [XII] is disclosed. ##STR1## wherein Z is a group of nonmetal atoms necessary to complete a nitrogen-containing heterocyclic ring where the ring formed by Z may be substituted; X is a hydrogen atom or a substituent capable of being released upon reaction with the oxidation product of a color developing agent and R is a hydrogen atom or substituent; ##STR2## wherein R.sub.21 is a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group and aryl group, R.sub.22 and R.sub.23 are independently selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group and an aryl group.The photographic material provides a dye-image highly stable against heat and light, and a formation of stain at a non-image area is prevented.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: June 13, 1989
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shuji Kida, Yutaka Kaneko, Kenji Kadokura, Shinji Yoshimoto, Kosaku Masuda
  • Silver halide photographic light-sensitive material to provide dye-image with improved color-fastness to light
    Patent number: 4814262
    Abstract: A silver halide photographic light-sensitive material improved in light-fastness of dye images and in prevention of yellow-stain formation in a non-colored area after processing. The photographic material comprises a support having thereon photographic structural layers including at least one silver halide emulsion layer. At least one of the photographic component layers contains a compound represented by the following Formula [I]: ##STR1## A magenta coupler represented by the following formula [M-I] is preferably used with the above compound.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: March 21, 1989
    Assignee: Megumi Ide
    Inventors: Shuichi Sugita, Shinji Yoshimoto, Naoko Shimada, Satoshi Nakagawa, Yutaka Kaneko, Toyoki Nishijima
  • Silver halide color photographic light-sensitive material
    Patent number: 4576911
    Abstract: A silver halide color photographic light-sensitive material containing a magenta dye-forming polymeric coupler.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: March 18, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noboru Mizukura, Noboru Fujimori, Kosaku Masuda, Shinji Yoshimoto, Noriki Tachibana, Eiichi Ueda
  • Light-sensitive silver halide photographic materials
    Patent number: 4234678
    Abstract: A photographic material having a light-sensitive silver halide emulsion layer coated on a support and containing a compound, useful as a development inhibitor of the formula: ##STR1## wherein X, Y and Z are as herein defined, is described.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: November 18, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shinji Yoshimoto, Mitsuto Fujiwhara, Shoji Kikuchi, Ryosuke Satoh, Takaya Endo, Satoshi Nakagawa