Patents by Inventor Katsunori Kato

Katsunori Kato 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: 4929539
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: May 29, 1990
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4772543
    Abstract: A silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein R.sup.3 is a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, or a monovalent organic group;X.sup.1 ' is --SO.sub.2 R.sup.1 ', in which R.sup.1 ' is an alkyl group or an aryl group;Z is a hydrogen atom or a removable group upon coupling reaction with an oxidized product of a color developing agent;n is 0 to 3; andBall is a ballast group; provided that Ball is not a non-substituted alkyl group.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: September 20, 1988
    Assignee: Konishiroku Photo Industry, Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4554244
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: November 19, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4532202
    Abstract: There is disclosed a coupler for photography represented by the formula: ##STR1## wherein R.sub.1 represents a branched alkyl group having 3 to 5 carbon atoms; R.sub.2 represents an aryl group; X represents a divalent linking group; Ar represents an aryl group; and Z is a hydrogen atom or a group eliminable through the coupling reaction with the oxidized product of an aromatic primary amine type color developing agent,and a light-sensitive silver halide photographic material comprising the same.The coupler mentioned above is not only excellent in solubility in organic solvents, but also can be easily purified, thus being capable of exhibiting excellent characteristics with respect to spectral absorption characteristics, sensitivity, color density, color staining as well as with respect to image storability such as light resistance, heat resistance and humidity resistance.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: July 30, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takashi Sasaki, Yutaka Kaneko, Fumio Ishii, Yasuo Tsuda, Kazuhiko Kimura, Katsunori Kato
  • Patent number: 4465766
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: August 14, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4463086
    Abstract: There are disclosed a light-sensitive silver halide color photographic material having a light-sensitive silver halide emulsion layer containing at least one kind of cyan dye forming couplers represented by the formula [I] or the formula [II] as defined in the specification provided on a reflective support, and a light-sensitive silver halide color photographic material further having a green-sensitive silver halide emulsion layer containing at least one kind of magenta couplers represented by the formula [III] as defined in the specification.The light-sensitive silver halide color photographic materials according to this invention have excellent color forming characteristics and form very fast dyes to heat, light and humidity.
    Type: Grant
    Filed: August 5, 1983
    Date of Patent: July 31, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takashi Sasaki, Yutaka Kaneko, Fumio Ishii, Yasuo Tsuda, Kazuhiko Kimura, Katsunori Kato
  • Patent number: 4451559
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: May 29, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4444872
    Abstract: A method for forming a silver halide color photographic image comprising forming a dye image in the presence of a phenol cyan coupler. The phenol cyan coupler has the following formula: ##STR1## wherein R is an alkyl, an aryl or a heterocyclic group; X is selected from the group consisting of an alkyl, acyloxy, acylamino, succinimide, and sulfoneamide moiety; Z is a hydrogen atom or a group capable of eliminating itself from the coupler during the coupling reaction with the oxidized product of a color developing agent; and n is an integer from 1 to 3, and when n is 2 or 3, X may be the same or different.
    Type: Grant
    Filed: August 10, 1982
    Date of Patent: April 24, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Katsunori Kato, Ryosuke Sato
  • Patent number: 4356258
    Abstract: A photographic acylacetanilide yellow coupler having at the acyl or anilide portion thereof a moiety represented by --X--Y--Z where X represents --NHCO-- or --CONH-- radical, Y represents a divalent organic radical, Z represents ##STR1## wherein R.sub.1 is an alkyl or aryl radical, and a color photographic material containing an acylacetanilide yellow coupler.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: October 26, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Tugumoto Usui, Katsunori Kato, Tamotsu Kojima
  • Patent number: 4289847
    Abstract: The present invention relates to a method of forming a dye image which involves processing a light-sensitive silver halide photographic image, after its imagewise exposure, in the presence of a novel yellow coupler as depicted in the formula below and an aromatic primary amine color developing agent ##STR1## wherein R.sub.1 represents cyano, alkyl carbonyl, phenylalkyl carbonyl, phenoxy alkyl carbonyl, phenylthio alkyl carbonyl, arylcarbonyl, alkyl phenyl carbonyl, alkoxy phenyl carbonyl, R.sub.2, R.sub.3, R.sub.4, R.sub.5 independently are hydrogen, halogen, alkyl, alkoxy, aryloxy, alkylacyloxy, arylacyloxy, acylamino, N-alkyl carbamoyl, N-phenylcarbamoyl, alkylsulfonamido, arylsulfonamido, N-alkyl sulfamoyl, N-phenylsulfamoyl, or imido, R.sub.6 represents cycloalkyl, alkenyl, naphthyl, thienyl, benzothienyl, furyl, or pyranyl, or a group of the formula (II): ##STR2## wherein R.sub.7, R.sub.9 and R.sub.11 are each hydrogen or alkyl, the sum of the carbon atoms in R.sub.7, R.sub.9 and R.sub.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: September 15, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Wataru Ishikawa, Mitsuto Fujiwhara, Tamotsu Kojima, Takaya Endo, Katsunori Kato
  • Patent number: 4286053
    Abstract: Process for forming yellow dye images in silver halide photographic material using 2-equivalent .alpha.-pivaloyl acetanilide couplers having at the 5-position a ballasting sulfonyl amido group.
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: August 25, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Wataru Ishikawa, Ryosuke Satoh, Kiyoshi Yamashita, Tugumoto Usui, Katsunori Kato
  • 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