Patents by Inventor Kazuhiro Murai

Kazuhiro Murai 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: 6171774
    Abstract: A silver halide photographic light sensitive material is disclosed.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: January 9, 2001
    Assignee: Konica Corporation
    Inventors: Kunimasa Hiyama, Kazuhiro Murai
  • Patent number: 6127108
    Abstract: A silver halide color photographic material wherein a cyan dye image density reduction is prevented in time of bleach fixing processing or bleach fixing, and its processing method by incorporating an oil soluble organic basic compound in the silver halide color photographic material. The compound oil soluble organic basic compound is represented by Formulas (I) to (V) defined in the specification.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: October 3, 2000
    Assignee: Konica Corporation
    Inventors: Hiroshi Kita, Kazuhiro Murai
  • Patent number: 5928850
    Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a dispersion material which is obtained by emulsifying a mixture of a yellow coupler represented by the formula and a polymer compound that is insoluble in water and soluble in an organic solvent.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: July 27, 1999
    Assignee: Konica Corporation
    Inventors: Kazuhiro Murai, Shigeo Tanaka, Kunimasa Hiyama
  • Patent number: 5721092
    Abstract: A method of forming an image is disclosed which comprises the steps of a) imagewise exposing a silver halide color photographic light sensitive material comprising a support and provided thereon, a photographic component layer comprising a light sensitive silver halide emulsion layer, the photographic component layer containing a compound represented by the following formula (I) or (II), b) color developed the exposed material, and c) bleach-fixing the developed material with bleach-fixer containing a silver ion in an amount of 0.04 to 0.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: February 24, 1998
    Assignee: Konica Corporation
    Inventors: Kazuhiro Murai, Hiroshi Kita
  • Patent number: 5314796
    Abstract: A silver halide color photographic light sensitive material excellent in both sharpness and whiteness of background while being capable of satisfactorily displaying the yellow coupler characteristics including an excellent color reproduction is provided, wherein the silver halide color photographic light sensitive material contains a compound represented by the following Formula [I] in at least one of the photographic component layers thereof, a compound represented by the following Formula [II] in at least one of the silver halide emulsion layers thereof, and a compound represented by the following Formula [III] in at least one of the photographic component layers; and ##STR1##
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: May 24, 1994
    Assignee: Konica Corporation
    Inventors: Kazuhiro Murai, Makoto Kajiwara, Hirokazu Sato, Shinri Tanaka, Mitsuhiro Okumura
  • Patent number: 5180659
    Abstract: A photosensitive silver halide photographic material having a support and provided thereon, photographic component layers including at least one silver halide emulsion layer is disclosed. At least one silver halide emulsion layer comprises silver halide grains having silver chloride content of not less than 90 mol %; at least one of the photographic component layers comprises a specific dye excellent in decolorization and capable of improving sharpness; at least one silver halide emulsion layer comprises a mercapto compound for improving aging stability of silver halide emulsions; a photographic component layer is hardened with cyanuric chloride series hardeners for improving fog.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: January 19, 1993
    Assignee: Konica Corporation
    Inventors: Kazuhiro Murai, Shun Takada
  • Patent number: 5112728
    Abstract: A silver halide photographic light-sensitive material comprising a support having thereon a photographic silver halide emulsion layer containing a magenta coupler, a photographic silver halide emulsion layer containing a yellow coupler, a photographic silver halide emulsion layer containing a cyan coupler and an non-light-sensitive layer containing a binder and a UV absorbent, wherein said silver halide photographic light-sensitive material has not more than 7.6 g/m.sup.2 of gelatin, said UV absorbent is liquid at an ordinary temperature, and said magenta coupler is a compound represented by Formula I; ##STR1## wherein Z represents a non-metallic group necessary to form a nitrogen-containing heterocyclic ring, X represents a hydrogen atom or a group capable of being split upon reaction with an oxidation product of a color developing agent, and R represents a hydrogen atom or a substituent.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: May 12, 1992
    Assignee: Konica Corporation
    Inventors: Masaki Tanji, Toyoki Nishijima, Takahiro Ogawa, Shun Takada, Kazuhiro Murai
  • Patent number: 4996138
    Abstract: There is provided a silver halide photographic light-sensitive material comprising a support and photographic layers containing at least one silver halide emulsion layer thereon. At least one silver halide emulsion layer contains a silver halide grains having a silver chloride content of not less than 90 mol % and silver bromide content of not less than 0.05 mol % and at least one photographic layer contains a specific oxanol dye. The silver halide photographic light-sensitive material is suitable for rapid processing and excellent in image-sharpness.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: February 26, 1991
    Assignee: Konica Corporation
    Inventors: Kazuhiro Murai, Yasuhiko Kawashima, Shun Takada, Nobuaki Kagawa
  • Patent number: 4963475
    Abstract: A method of processing an imagewise exposed light-sensitive silver halide photographic material. The material contains a silver halide emulsion layer containing silver halide grains which are sensitized with a monomethine dye. The material is processed with a developer solution containing an aromatic primary amine color developing agent in the presence of at least one hydroxylamine derivative and at least one nitrogen containing heterocyclic mercapto compound.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: October 16, 1990
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kazuhiro Murai, Keiji Ohbayashi, Kaoru Onodera
  • Patent number: 4820614
    Abstract: A silver halide photographic light sensitive material improved in suitability for rapid processing and in color forming efficiency, spectral absorption property and fastness of the cyan image is disclosed.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: April 11, 1989
    Assignee: Konica Corporation
    Inventors: Shun Takada, Kazuhiro Murai, Kaoru Onodera