Patents by Inventor Yasufumi Nakai

Yasufumi Nakai 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).

  • Publication number: 20030224300
    Abstract: A photographic processing composition for silver halide color photographic lightsensitive material, comprising at least one compound represented by the formula (I):
    Type: Application
    Filed: June 18, 2003
    Publication date: December 4, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Makoto Suzuki, Yasufumi Nakai, Yoshiharu Yabuki
  • Patent number: 6632594
    Abstract: A processing composition for a silver halide photographic material, which comprises at least one compound selected from the group consisting of compounds represented by the following general formulae (I) and (II):
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: October 14, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasufumi Nakai, Keizo Kimura, Shigeaki Tanaka, Yoshiharu Yabuki
  • Patent number: 6620579
    Abstract: The present invention provides a processing composition for a silver halide color photographic photosensitive material. The processing composition has excellent functions of reducing stain caused by residual dyes in a photosensitive material and of making no segregated deposit even in low temperature storage of the processing composition. The processing composition of the invention contains a bis-triazinylarylenediamine derivative and a diaminostilbene derivative. The invention also provides an image-formation process using the processing composition of the invention.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: September 16, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasufumi Nakai, Makoto Suzuki
  • Patent number: 6605420
    Abstract: A processing composition for silver halide photographic light-sensitive materials, comprises a bis[2,6-diaminotriazin-4-yl]arylenediamine derivative having at least one of a sulfonic acid group, a carboxylic group and a hydroxyl group within the molecule. This processing composition can be applied to a color developer, a bleaching agent, a fixing agent, a bleach-fixing agent and a stabilizing agent and also to a processing agent in a concentration on use, a concentrated processing agent and a solid processing agent.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: August 12, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasufumi Nakai, Keizo Kimura, Masashi Ogiyama
  • Publication number: 20030054298
    Abstract: A photographic processing composition for silver halide color photographic lightsensitive material, comprising at least one compound represented by the formula (I):
    Type: Application
    Filed: March 29, 2002
    Publication date: March 20, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Makoto Suzuki, Yasufumi Nakai, Yoshiharu Yabuki
  • Publication number: 20020150846
    Abstract: The present invention provides a processing composition for a silver halide color photographic photosensitive material. The processing composition has excellent functions of reducing stain caused by residual dyes in a photosensitive material and of making no segregated deposit even in low temperature storage of the processing composition. The processing composition of the invention contains a bis-triazinylarylenediamine derivative and a diaminostilbene derivative. The invention also provides an image-formation process using the processing composition of the invention.
    Type: Application
    Filed: December 27, 2001
    Publication date: October 17, 2002
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Yasufumi Nakai, Makoto Suzuki
  • Publication number: 20020055071
    Abstract: A processing composition for silver halide photographic light-sensitive materials, comprises a bis[2,6-diaminotriazin-4-yl]arylenediamine derivative having at least one of a sulfonic acid group, a carboxylic group and a hydroxyl group within the molecule. This processing composition can be applied to a color developer, a bleaching agent, a fixing agent, a bleach-fixing agent and a stabilizing agent and also to a processing agent in a concentration on use, a concentrated processing agent and a solid processing agent.
    Type: Application
    Filed: August 21, 2001
    Publication date: May 9, 2002
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Yasufumi Nakai, Keizo Kimura, Masashi Ogiyama
  • Publication number: 20010031432
    Abstract: A processing composition for a silver halide photographic material, which comprises at least one compound selected from the group consisting of compounds represented by the following general formulae (I) and (II): 1
    Type: Application
    Filed: January 29, 2001
    Publication date: October 18, 2001
    Inventors: Yasufumi Nakai, Keizo Kimura, Shigeaki Tanaka, Yoshiharu Yabuki
  • Patent number: 5830627
    Abstract: A silver halide color photographic material is described, which comprises a support having provided thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, and a red-sensitive silver halide emulsion layer, wherein the photographic material contains at least one compound having a photographically useful compound which is inactivated by the chelation with a metal, and the ratios of the gradients of yellow, magenta and cyan in specific development processing II to the gradients thereof in specific development processing I satisfy the following conditions:0.8.ltoreq..gamma..sub.II (Y)/.gamma..sub.I (Y).ltoreq.1.20.8.ltoreq..gamma..sub.II (M)/.gamma..sub.I (M).ltoreq.1.20.8.ltoreq..gamma..sub.II (C)/.gamma..sub.I (C).ltoreq.1.2wherein .gamma..sub.I (Y), .gamma..sub.I (M) and .gamma..sub.I (C) each represents the gradient of yellow, magenta or cyan when the development processing I is carried out and .gamma..sub.II (Y), .gamma..sub.II (M) and .gamma..sub.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: November 3, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasufumi Nakai, Jiro Tsukahara, Toshio Kawagishi
  • Patent number: 5827638
    Abstract: A silver halide photographic light-sensitive material is described, which comprises a support having provided thereon a light-sensitive silver halide emulsion layer, wherein the silver halide photographic material contains a compound having been blocked by a metal chelate and capable of releasing a photographically useful compound therefrom through a reaction of the metal chelate moiety with a water-soluble chelating agent capable of forming a metal chelate having a higher stability constant on development. A method for forming an image is also described, which comprises processing, after imagewise exposure, a silver halide photographic light-sensitive material with a processing solution containing a nitrogen-containing heterocyclic carboxylic acid-base chelating agent.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: October 27, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Jiro Tsukahara, Hideaki Satoh, Osamu Uchida, Toshio Kawagishi, Yasufumi Nakai
  • Patent number: 5827637
    Abstract: A silver halide light-sensitive material is disclosed, comprising a compound represented by the following formula (1): ##STR1## wherein PUG represents a photographically useful group bonded to B through a hetero atom thereof, CHL represents a multidentate ligand capable of coordinating to a metal atom, B represents a block group of which bonding to PUG is cleaved on cleavage of the bonding of CHL--M, M represents a divalent or greater metal, L represents a chelating ligand, m represents an integer of from 1 to 3, n represents 0 or an integer of 1 or 2, and the sum of m and n does not exceed 3. Also disclosed is an image formation method using the above-described silver halide light-sensitive material.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: October 27, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Osamu Uchida, Jiro Tsukahara, Toshio Kawagishi, Hideaki Satoh, Yasufumi Nakai
  • Patent number: 5110714
    Abstract: There is disclosed a method for processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent. In the method a silver halide color photographic material having at least one of the layers of which comprises a silver halide emulsion of high chloride containing 80 mol % or over of silver chloride, and containing at least one coupler having relative coupling rate of 0.05 or over in each color-sensitive layer is processed, after exposure to light, with a color developer containing a specified amount of chloride ions and bromide ions.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: May 5, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Genichi Furusawa, Yasuhiro Yoshioka, Yasufumi Nakai