Patents by Inventor Nobuo Seto

Nobuo Seto 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: 5300419
    Abstract: Disclosed is a silver halide color photographic material containing at least one cyan dye forming coupler of the following general formula (C-1) and at least one compound of the following general formula (I) in the same layer of the material: ##STR1## where R.sub.0 represents an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group;X represents a hydrogen atom, or a group capable of being split off by a coupling reaction with the oxidation product of an aromatic primary amine color developing agent; andAr represents an aromatic group; ##STR2## where R.sub.1, R.sub.2 and R.sub.3 each represent an aliphatic group, an aryl group, or a heterocyclic group;R.sub.4 represents a hydrogen atom, an aliphatic group, an aryl group, or a heterocyclic group;R.sub.1 and R.sub.2, or R.sub.3 and R.sub.4 may be bonded to each other to form a 5-membered to 8-membered ring along with the nitrogen atom in the formula;the compound of formula (I) may form a dimer or a higher polymer at the position of R.sub.1, R.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: April 5, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Hiroyuki Yoneyama, Masakazu Morigaki, Hidekazu Sakai, Hidetoshi Kobayashi, Shigeru Yamazaki
  • Patent number: 5294530
    Abstract: A silver halide color photographic material comprising a support having thereon one or more hydrophilic colloid layers, at least one layer which is a light-sensitive silver halide emulsion layer containing in the same layer a color coupler selected from a yellow coupler and a cyan coupler and at least one anti-fading agent represented by formula (I): ##STR1## The novel anti-fading agent effectively prevents yellow and cyan dye images from fading or discoloration, and does not adversely affect other photographic properties.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: March 15, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5278039
    Abstract: There is disclosed a silver halide color photographic light-sensitive material capable of providing a color image which does not discolor for a long period of time and having a high preservation property. The light-sensitive material contains a novel anti-fading agent represented by following Formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, or an aliphatic oxy group; R.sub.2 and R.sub.3 may be the same or different and each represent an aliphatic group, an aromatic group, and a heterocyclic group; R.sub.4 represents a substituent; R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 each represent a hydrogen atom and a substituent; R.sub.2 and R.sub.3, R.sub.3 and R.sub.4, and R.sub.4 and R.sub.2 may be combined with each other to form a 5- to 8-membered ring, and a dimer or other polymer may be formed with R.sub.1, R.sub.2, R.sub.3 and R.sub.4 ; R.sub.5 and R.sub.6, R.sub.6 and R.sub.7, R.sub.7 and R.sub.8, and R.sub.8 and R.sub.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: January 11, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Hiroshi Fukuzawa, Masakazu Morigaki
  • Patent number: 5254433
    Abstract: A dye fixing element to which a diffusible dye is transferable, the dye having been formed or released during development, either after or at the same time as imagewise exposure of a photosensitive element, which photosensitive element comprises a photosensitive silver halide, a binder and a dye providing compound which forms or releases a diffusible dye in correspondence or counter-correspondence to the exposure, wherein the dye fixing element comprises at least one compound represented by general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and X are as defined in the specification.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: October 19, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshisada Nakamura, Nobuo Seto, Masakazu Morigaki
  • Patent number: 5242785
    Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide color photographic material contains (1) at least one compound selected from the group consisting of compounds represented by the general formula (I), (II) or (III) and dimers or higher polymers containing at least one moiety derived from the compounds, and (2) at least one compound selected from the group consisting of organic color fading preventing agents represented by the general formula (IV) and dimers or higher polymers containing at least one moiety derived from the agents, organic metal complexes containing copper, cobalt, nickel, palladium or platinum as the central metal and having at least one organic ligand having at least one conformation and dimers or higher polymers containing at least one moiety derived from the complexes: ##STR1## wherein R.sub.30 represents an aliphatic group, an aromatic group or a heterocyclic group; R.sub.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: September 7, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Nobuo Seto
  • Patent number: 5212055
    Abstract: A silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a dispersion of silver halide grains in a binder, wherein the silver halide emulsion layer contains (a) at least one coupler represented by formula (I), (b) at least one compound represented by the formula (II), and (c) at least one compound represented by formula (III), and the photographic material contains (d) at least one compound represented by formulae (IV), (V) or (VI): ##STR1## wherein R, Y, Za, Zb and Zc each is as defined in the specification; ##STR2## wherein R.sub.1, R.sub.2, R.sub.5 and R.sub.6, and R.sub.7 each is as defined in the specification ##STR3## wherein R.sub.11, R.sub.12 and R.sub.13, R.sub.14, R.sub.15, R.sub.16 and R.sub.17 each is as defined in the specification; ##STR4## wherein R.sub.21, R.sub.22 A, B, X, Y.sub.1 and n each is as defined in the specification; andR.sub.30 --Z (VI)R.sub.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: May 18, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Nobuo Seto, Kozo Aoki
  • Patent number: 5194348
    Abstract: Disclosed in a color photograph containing a storability-improving compound capable of forming a chemical bond with an aromatic amine series color developing agent that remains in a photographic material after having been processed for color development to give a chemically inactive and substantially colorless compound in at least one photographic layer on a support. Also disclosed is a method for preparation of color photographs wherein a photographic material containing a silver halide emulsion layer and a color image-forming coupler capable of forming a dye by an oxidation-coupling reaction with an aromatic amine series color developing agent, as coated on a support, is imagewise exposed to light and then subjected to photographic processing, comprising carrying out the photographic processing in the presence of the afore described storability-improving compound.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: March 16, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Nobuo Seto, Osamu Takahashi, Hideaki Naruse
  • Patent number: 5192650
    Abstract: A silver halide color photographic material is disclosed, which comprises a support having thereon a photographic layer containing at least one compound represented by formula (I): ##STR1## wherein each of R.sub.01, R.sub.02 and R.sub.03, which may be the same or different, represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; R.sub.01 and R.sub.02, R.sub.02 and R.sub.03, and R.sub.01 and R.sub.03 may be combined with each other, provided that all of R.sub.01, R.sub.02 and R.sub.03 are not hydrogen atoms at the same time; each of X.sub.01, X.sub.02 and X.sub.03, which may be the same or different, represents a mere bond, --O--, --S-- or ##STR2## and R.sub.04 has the same meaning as R.sub.01.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: March 9, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5190853
    Abstract: A silver halide color photosensitive material is disclosed. The photosensitive material comprises a support and a hydrophilic colloidal layer containing a yellow coupler. According to the present invention, the layer further contains a color image stabilizer in an amount of 10 to 200 mole % based on the amount of the yellow coupler. The color image stabilizer and the yellow coupler are together contained in droplets of a medium which are dispersed in the layer. The color image stabilizer is an organic compound having the following formula [I] or [II]: ##STR1## in which each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently is hydrogen, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphoryl group, a carbamoyl group or a sulfamoyl group; each of R.sup.5 and R.sup.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: March 2, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5139931
    Abstract: A silver halide color photographic material is disclosed having at least one coupler of the following formula (I), at least one compound of the following formula (II), and at least one compound of the following formula (III) in the same layer: ##STR1## wherein the substituent groups are as defined in the specification. The material resists fogging and forms a color image having excellent light-fastness.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: August 18, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5108876
    Abstract: A color photograph comprising a support having provided thereon at least one photographic layer, wherein said at least one photographic layer contains a storage stability improving compound which forms a chemically inert and substantially colorless compound by combining chemically with the oxidation product of an aromatic amine color developing agent remaining in said color photograph after color development processing.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: April 28, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Nobuo Seto, Osamu Takahashi, Hideaki Naruse
  • Patent number: 5104781
    Abstract: The present invention relates to a silver halide color photographic light sensitive material having at least one silver halide color photographic light-sensitive emulsion layer on a support which comprises (i) at least one coupler represented by Formula (I), (ii) at least one compound represented by Formula (II), (iii) at least one compound represented by Formula (III), and (iv) at least one high boiling organic solvent represented by Formula (IV), wherein each of the couplers and the compounds represented by Formulas (I) to (IV) are incorporated in the same light sensitive layer, and wherein Formulas (I) to (IV) are shown below. ##STR1## The substituents are defined hereinbelow.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: April 14, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5104782
    Abstract: A silver halide color photographic material wherein at least one pyrazoloazole dye forming coupler, at least one compound represented by formula (A) and at least one compound represented by formula (B) are included in the same layer: ##STR1## wherein the substituents are as defined in the specification.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: April 14, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5068172
    Abstract: A silver halide color photographic material wherein at least one coupler selected from the group consisting of the compounds represented by the following general formulae (I) and (II), at least one compound represented by the following general formula (III) and at least one compound represented by the following general formula (IV) are included in the same layer, ##STR1## wherein the values of R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, A and X are defined in the specification. The photographic materials disclosed exhibit outstanding image storage stability, a decreased occurrence of stain in unexposed portions and a decreased occurrence of color fading by light in their magenta image.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: November 26, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki, Hideaki Naruse
  • Patent number: 5068171
    Abstract: The present invention relates to a silver halide color photographic light sensitive material comprising a support and at least one silver halide emulsion layer on the support, wherein the material contains (1) at least one 5-pyrazolone coupler represented by formulas (II) or (III): ##STR1## and (2) at least one compound selected from the group consisting of compounds represented by formulas (AI), (AII) and (AIII):R.sub.1 --A--.sub.n X (AI) ##STR2##R--Z (AIII)wherein the substituents are as defined in the text of the specification.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: November 26, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Nobuo Seto
  • Patent number: 5043460
    Abstract: There is provided a silver halide color photographic material containing a 6-hydroxychroman derivative in combination with a specific coupler, i.e., a 5-pyrazolone type magenta coupler having an -SR group at the coupling position or a 5-pyrazolone type magenta coupler having an anilino group at the 3-position. The photosensitive material provides photographic images, quality of which is prevented from deteriorating as time passes. The photographic color images are free from discoloration or fading and do not form yellow stains on a white background.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: August 27, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki, Nobuo Sakai
  • Patent number: 5028519
    Abstract: A silver halide color photosensitive material is disclosed. The photosensitive material comprises a support and a photographic layer. According to the present invention, the photographic layer contains a heterocyclic compound. The heterocyclic compound is, for example, represented by the following formula [I]: ##STR1## in which n is 1, 2 or 3; and each of Ra and Rb independently is an acyl group, a sulfonyl group, a sulfinyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a phosphoryl group, a sulfamoyl group or a carbamoyl group. The other heterocyclic compounds represented by the formulas [II], [III], [IV], [V], and [VI] are also disclosed.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: July 2, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Nobuo Seto
  • Patent number: 5006456
    Abstract: A method for processing a silver halide color photographic light-sensitive material comprises the steps of developing the light-sensitive material with a color developer containing an aromatic primary amine color developing agent, desilvering, washing with water and/or stabilizing the material in which at least one processing solution used in at least one step of the processing contains at least one compound selected from the group consisting of sulfinic acids and salts and precursors thereof. This method makes it possible to effectively prevent the formation of stains due to not only the components of the light-sensitive material per se but also those attributable to the processing solutions, during processing or storage with time, and to enhance the stability of processing solutions.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: April 9, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Takatoshi Ishikawa, Kazuto Andoh, Nobuo Seto, Toshio Koshimizu, Shinji Ueda
  • Patent number: 5004678
    Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, the silver halide color photographic material containing at least one pyrazoloazole type coupler represented by general formula (I) described below and at least one compound represented by general formula (II) described below. ##STR1## wherein R.sub.1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being released upon a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, .dbd.N-- or --NH--, one of the Za--Zb bond and the Zb--Zc bond being a double bond and the other being a single bond; when the Zb--Zc bond is carbon-carbon double bond, the Zb-Zc bond may be a part of a condensed aromatic ring; R.sub.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: April 2, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: H851
    Abstract: A silver halide color photographic material which contains at least one coupler represented by the general formula (I) or (II-A) and at least one compound represented by the following general formula (III) in the same light-sensitive silver halide layer: ##STR1## wherein R.sub.1 represents an alkyl group, an aryl group, or a heterocyclic group; R.sub.2 represents a hydrogen atom, or a substituent group; and X represents a hydrogen atom, or a coupling-off group; ##STR2## wherein R represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an oxy radical, or a hydroxyl group; R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents a hydrogn atom, or an alkyl group; and A represents a nonmetallic atomic group necessary for forming a 5-, 6- or 7-membered ring; provided that R.sub.3 may be linked with R.sub.4, R.sub.5 may be linked with R.sub.6, R may be linked with R.sub.3, or R.sub.3 may be linked with A to form a 5- or 6-membered ring.
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: November 6, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideaki Naruse, Masakazu Morigaki, Nobuo Seto