Patents by Inventor Shoji Kikuchi

Shoji Kikuchi 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).

  • Process for forming a cyan dye image by the use of a 2-equivalent cyan coupler
    Patent number: 4205990
    Abstract: A process for forming a cyan dye image by using a novel photographic 2-equivalent cyan coupler which is characterized by having a splitt-off group of the below-indicated general formula at the active position of the cyan coupler so that the oxy portion is present on the side of the active position: ##STR1## wherein R.sub.1 and R.sub.2 stand for a hydrogen atom or an organic group, provided at least one of R.sub.1 and R.sub.2 should be an organic group, is disclosed.
    Type: Grant
    Filed: October 3, 1978
    Date of Patent: June 3, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hidetaka Deguchi, Takaya Endo, Shoji Kikuchi, Toshiki Komaita
  • Process for forming a photographic magenta dye image
    Patent number: 4191574
    Abstract: A process for forming a photographic magenta dye image is disclosed which requires contacting exposed silver halide with a color developing agent in the presence of a particular class of 2-equivalent magenta couplers.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: March 4, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takaya Endo, Shui Sato, Shoji Kikuchi, Tamotsu Kozima, Tugumoto Usui, Hiroyuki Imamura, Koichi Takabe
  • Silver halide emulsion containing two equivalent type coupler for use in photography
    Patent number: 4138264
    Abstract: A novel two-equivalent naphthol or phenol type cyan coupler is disclosed wherein the active position thereof has a split-off group which contains a bonding group of the formula ##STR1## wherein R is hydrogen atom or a divalent organic group. The present coupler is incorporated into a photographic material containing a photosensitive emulsion layer.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: February 6, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hajime Wada, Kazuhiko Kimura, Haruo Hori, Shoji Kikuchi, Takaya Endo
  • Dye image forming process
    Patent number: 4134766
    Abstract: Cyan couplers of the 2-equivalent type having the formula ##STR1## wherein C.sub.p, R.sub.1 -R.sub.6, Z, n, p and q are herein defined are described. These couplers are useful in photography, and photographic materials and developers incorporating these couplers are also described.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: January 16, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shoji Kikuchi, Hajime Wada, Takaya Endo, Hidetaka Deguchi, Toshiki Komaita, Wataru Ishikawa
  • Process for forming a photographic magenta dye image
    Patent number: 4126462
    Abstract: The present invention relates to a process for forming photographic images using a 2-equivalent magenta coupler position a radical of the following general formula:--O--SO.sub.2 --Rwhere R is an aliphatic hydrocarbon, aromatic hydrocarbon or heterocyclic residue.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: November 21, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takaya Endo, Shui Sato, Shoji Kikuchi, Tamotsu Kozima, Tugumoto Usui, Hiroyuki Imamura, Koichi Takabe
  • Color photographic developing composition
    Patent number: 4113491
    Abstract: Color developers represented by the following general formula are useful as color developing agents: ##STR1## R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are defined herein.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: September 12, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hidetaka Deguchi, Shoji Kikuchi, Hajime Wada, Shui Satoh, Takaya Endo
  • Photosensitive material for color photography
    Patent number: 4075021
    Abstract: The present invention discloses a multi-layer photosensitive material for color photography in which a compound capable of reacting with an oxidation product of a developing agent to release a substance promoting bleaching of developed silver at the bleaching or blixing step after the development treatment is incorporated into at least one layer constituting said photosensitive material.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: February 21, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shoji Kikuchi, Takaya Endo, Teruo Kagami, Ryosuke Sato
  • DIR coupler that forms colorless reaction product
    Patent number: 4063950
    Abstract: A light-sensitive silver halide photographic material comprising a new development inhibitor releasing type compound and a process for developing thereof.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: December 20, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Shoji Kikuchi, Ryosuke Satoh
  • Photographic silver halide emulsion containing 2-equivalent cyan coupler
    Patent number: 4052212
    Abstract: Cyan couplers of the 2-equivalent type, useful in photography are described. These compounds are characterized in that they have at least one divalent group of the formula, --OCH.sub.2 CO--, in the molecule with a split-off group at the methoxy site of said divalent radical. Photographic materials and color developers incorporating these couplers are also described.
    Type: Grant
    Filed: February 5, 1975
    Date of Patent: October 4, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hidetaka Deguchi, Hajime Wada, Takaya Endo, Shoji Kikuchi, Haruo Hori
  • Light-sensitive silver halide photographic material
    Patent number: 4049455
    Abstract: A light-sensitive silver halide photographic material containing a new development inhibitor releasing compound. The said compound has no hydrogen atom at the carbon atom which is adjacent to the carbonyl group and capable of coupling to an oxidation product of a color developing agent on the development.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: September 20, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shoji Kikuchi, Ryosuke Satoh, Takaya Endo, Katsunori Kato
  • Method for developing an exposed silver halide color photosensitive material
    Patent number: 4028106
    Abstract: An improved method for developing an exposed silver halide color photosensitive material is disclosed which comprises conducting the development in the presence of a cyan coupler. The coupler has, in the active position thereof, the following split-off group: ##STR1## WHEREIN R.sub.1 is an aliphatic hydrocarbon residue, an aromatic hydrocarbon residue, or a heterocyclic ring residue; R.sub.2 is an aliphatic hydrocarbon residue or an aromatic hydrocarbon residue; l is an integer of 0 to 4 inclusive.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: June 7, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Haruo Hori, Shoji Kikuchi, Hajime Wada, Sadatosi Kobayasi, Takaya Endo