Patents by Inventor Kouichi Hanaki

Kouichi Hanaki 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).

  • Patent number: 5541044
    Abstract: The present invention relates to a silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein at least one layer of said photographic material contains at least one yellow coupler represented by the following general formulas (3) or (2): ##STR1## as defined in the specification.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: July 30, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsuru Yamamoto, Shigeo Hirano, Akira Ogawa, Kouichi Hanaki
  • Patent number: 5210012
    Abstract: A silver halide color photographic material is provided comprising on a support at least one silver halide emulsion layer containing at least one of the compounds represented by formulae (I) to (III): ##STR1## wherein R.sub.11 represents ##STR2## in which R.sub.13 represents an alkyl, aryl or heterocyclic group, and R.sub.14 and R.sub.15 each represents hydrogen, alkyl group or aryl group; R.sub.12 represents a substituent having a Hammett's substituent constant .sigma.p of 0.3 or less; n represents an integer 0 to 2, and when n is 2, the two R.sub.12 's may be the same or different; B represents a group which releases PUG after being separated from a hydroquinone nucleus; PUG represents a development inhibitor; l represents an integer; and A and A' each represents hydrogen or a group capable of being removed by an alkali; R.sub.11 and R.sub.12, R.sub.11 and A or A', R.sub.12 and A or A', and two R.sub.12 's may together form a ring; ##STR3## wherein Q.sup.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: May 11, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Michio Ono, Kouichi Hanaki, Kei Sakanoue, Shigeo Hirano, Mitsuru Yamamoto
  • Patent number: 5026634
    Abstract: A color light sensitive material which provides a positive dye image having high density, good color reproducibility and which exhibits excellent preservability before use. The material comprises a support having provided thereon a light-sensitive silver halide, a binder, a reducible dye donating compound, and at least one reducing agent selected from the group consisting of a compound represented by formula (IA) and a compound represented by formula (IB): ##STR1## wherein the substituents have the meanings indicated in the specification.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: June 25, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Michio Ono, Hiroyuki Hirai, Nobutaka Ohki, Kouichi Hanaki, Koki Nakamura
  • Patent number: 4988613
    Abstract: A silver halide color photographic material composed of a support having thereon at least one light-sensitive silver halide emulsion layer containing a color coupler, at least one layer of the material containing a compound represented by formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, each represents hydrogen, a halogen atom, a sulfo group, a carboxyl group, a cyano group, an alkyl group, an aryl group, an acylamino group, a sulfonamido group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, an acyloxy group, a sulfonyl group, a carbamoyl group, an alkoxycarbonyl group or a sulfamoyl group; provided that R.sup.1 and R.sup.2, or R.sup.4 and R.sup.5 may each be linked to form a carbon ring or a heterocyclic ring; and Z represents a single bond or a divalent linking group.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: January 29, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobutaka Ohki, Hideaki Naruse, Satoshi Nagaoka, Kouichi Hanaki