Patents by Inventor Toyoki Nishijima

Toyoki Nishijima 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: 4684603
    Abstract: There is disclosed a light-sensitive silver halide photographic material which comprises containing at least one coupler represented by the formula (I) shown below and at least one of the compounds represented by the formulae (XI) and (XII) shown below: ##STR1## wherein Z represents a group of non-metallic atoms necessary for forming a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent eliminatable through the reaction with the oxidized product of a color developing agent; and R represents a hydrogen atom or a substituent, ##STR2## wherein X.sup.1, X.sup.2 and X.sup.4 each represents an oxygen atom, a sulfur atom or --NR.sup.10 --(R.sup.10 represents a hydrogen atom, an alkyl group, an aryl group or a hydroxyl group); X.sup.3 represents a hydroxyl group or a mercapto group; Y represents an oxygen atom or a sulfur atom; R.sup.1, R.sup.2 and R.sup.3 each represents a hydrogen atom, an alkyl group or an aryl group, provided that at least two of R.
    Type: Grant
    Filed: December 4, 1985
    Date of Patent: August 4, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toyoki Nishijima, Kaoru Onodera
  • Patent number: 4675275
    Abstract: There is disclosed a light-sensitive silver halide photographic material which comprises at least one coupler represented by the formula (I) shown below, at least one of the compounds represented by the formulae (XI), (XII) and (XIII) shown below and at least one of the compounds represented by the formulae (XXI), (XXII) and (XXIII) shown below: ##STR1## wherein Z, X and R have the same meanings as defined in the specification, ##STR2## wherein M, X.sup.3, Y, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Z.sup.0 have the same meanings as defined in the specification, ##STR3## wherein R.sub.1), J, R.sub.2), R.sub.3), R.sub.4), R.sub.5), R.sub.6), R.sub.7), R.sub.8), R.sub.9) and R.sub.10) have the same meanings as defined in the specification.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: June 23, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toyoki Nishijima, Kaoru Onodera
  • Patent number: 4623616
    Abstract: A silver halide photographic light-sensitive material comprising a support bearing thereon a silver halide emulsion layer containing a diffusionproof coupler and being hardened with a hardening agent represented by Formula [II] and/or Formula [III] indicated below is enabled to acquire improved film properties and enjoy increased freedom from repression of latent image by using, as the diffusionproof coupler, a compound represented by Formula [I] indicated below: Formula [I] ##STR1## wherein R.sub.1 denotes a straight or branched alkyl group having 2 to 4 carbon atoms; R.sub.2 a ballast group; and X a hydrogen atom or a group capable of splitting off through reaction with the oxidation product of an aromatic primary amine type color developing agent. ##STR2## wherein R.sub.3 denotes a chlorine atom, a hydroxy group, an alkyl group, an alkoxy group, an amino group, an acylamino group, or a --OM group in which M denotes a monovalent metal atom; R.sub.4 has the same meaning as R.sub.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: November 18, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shun Takada, Takashi Kadowaki, Masao Sasaki, Toyoki Nishijima, Kaoru Onodera
  • Patent number: 4564590
    Abstract: A silver halide photographic material having one or more silver halide emulsion layers formed on a reflective support is disclosed, wherein at least one of the silver halide emulsion layers contains at least one cyan coupler of formula (I) dispersed therein with the aid of at least one high-boiling organic solvent having a dielectric constant of 6.1 or more, and wherein at least one photographic layer contains at least one dye of formula (II) and/or formula (III): ##STR1## wherein R.sub.1 is a straight- or branched-chain alkyl group having 2 to 4 carbon atoms; R.sub.2 is a ballast group; and X is a hydrogen atom or a group capable of leaving upon coupling reaction with the oxidized product of a color developing agent; ##STR2## wherein R.sub.3 and R.sub.5 are each a hydrogen atom, an alkyl group or an aryl group; R.sub.4 and R.sub.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: January 14, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masao Sasaki, Toyoki Nishijima, Shun Takada, Takashi Kadowaki, Kaoru Onodera
  • Patent number: 4540653
    Abstract: A photographic element comprising a support having thereon a layer containing a dye that is formed by the reaction of an anilino-type magenta coupler with the oxidized product of a color developing agent, the said layer comprising an organic solvent having a dielectric constant of not more than 6.5 and at least one of metallic complexes having the following Formula [I], Formula [II] or Formula [III]: ##STR1## In Formulas [I], [II] and [III], M is a nickel atom, copper atom, cobalt atom, palladium atom or platinum atom; X.sub.1 and X.sub.2 each is an oxygen atom, sulfur atom or --NR.sub.5 -- (wherein R.sub.5 is a hydrogen atom, an alkyl, aryl or hydroxyl radical); X.sub.3 is a hydroxyl or mercapto radical; Y is an oxygen atom or sulfur atom; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is a hydrogen atom or a halogen atom or a cyano radical, or an alkyl, aryl, cycloalkyl or heterocyclic radical which each is bonded directly or through a divalent combining radical to a carbon atom; and at least one of the R.sub.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: September 10, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toyoki Nishijima, Kaoru Onodera
  • Patent number: 4526853
    Abstract: A silver halide color photographic material having improved whiteness and a method of processing said material are disclosed. The material is formed on a hydrophobic support at least one silver halide emulsion layer, a layer containing a brightening agent and a layer containing a compound that is capable of trapping the brightening agent, said layer containing a compound capable of trapping the brightening agent being separate from the layer containing the brightening agent and positioned more remote from the support than the latter layer, and also, the method for providing enhanced brightening effect comprises subjecting said material to imagewise exposure and color development so that said brightening agent is diffused into and trapped by the layer containing capable of trapping the brightening agent.
    Type: Grant
    Filed: October 14, 1983
    Date of Patent: July 2, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toyoki Nishijima, Masao Sasaki, Kaoru Onodera
  • Patent number: 4425418
    Abstract: New liquid developers for electrophotography comprise (a) a coloring agent, (b) a charge control agent and (c) one or more of a polyethylene, a polypropylene, an ethylene copolymer and a propylene copolymer, with or without (d) a hydrocarbon resin soluble in a hydrocarbon solvent and containing a 1,3-pentadiene moiety, in an electro-insulating liquid. These developers have an excellent etching resistance and a high dispersion stability.
    Type: Grant
    Filed: May 12, 1982
    Date of Patent: January 10, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Akio Iwaki, Toyoki Nishijima, Akio Iijima, Tatsuya Sasazawa