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: 6106991
    Abstract: There is disclosed a photographic element which contains, in a binder on a base, a specified compound having a group that is capable of causing chemical reaction with a reactive group contained in the binder, to form a covalent bond. According to the photographic element, a color image excellent in light-fastness can be obtained.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: August 22, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiki Taguchi, Takeshi Shibata, Nobuo Seto, Hideaki Naruse, Akio Mitsui
  • Patent number: 6010819
    Abstract: A method for improving light fastness of an image, which comprises releasing or forming an image forming dye or a precursor thereof corresponding or counter-corresponding to silver development and allowing an image formed by transferring said image forming dye or precursor thereof to coexist with a compound represented by general formula (I) in an image forming material ##STR1## The symbols in formula (I) are defined in the description. Also disclosed is an image forming material for use in the method.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: January 4, 2000
    Assignee: Fuji Photo Film., Ltd.
    Inventors: Hiroshi Arakatsu, Nobuo Seto, Yoshisada Nakamura, Hironori Hiyoshi, Hiroyuki Watanabe, Takayoshi Kamio
  • Patent number: 5731140
    Abstract: A pyrazolylazophenol dye exhibiting excellent spectral characteristics and having high fastness to light, heat, air or chemicals, and a color light-sensitive material containing an image forming compound comprising the dye, which releases a magenta dye exhibiting excellent spectral characteristics and having high fastness to light, heat, air or chemicals.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: March 24, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takayoshi Kamio, Nobuo Seto, Hironori Hiyoshi
  • Patent number: 5672722
    Abstract: A silver halide color photographic material comprising a support having thereon at least one layer containing at least one compound represented by formula (A) ##STR1## wherein the definition of R.sub.a1, R.sub.a2, R.sub.a3, Z, Y, m and n is described in the specification.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 30, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Yasuhiro Yoshioka, Masakazu Morigaki
  • Patent number: 5567578
    Abstract: Provided is a silver halide color photographic material containing at least one particular acylamide-type yellow coupler in at least one light-sensitive layer therein along with a particular bisphenolic image stabilizer and a particular spirocyclic or bicyclic image stabilizer. The material has excellent coloring properties and excellent color reproducibility and forms thereon color images having high fastness to light all from the high-density areas to the low-density areas.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: October 22, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiyuki Makuta, Nobuo Seto, Yasuhiro Yoshioka
  • Patent number: 5534390
    Abstract: A silver halide color photographic material comprising a support having thereon at least one layer containing at least one compound represented by formula (A) ##STR1## wherein the definition of R.sub.a1, R.sub.a2, R.sub.a3, Z, Y, m and n is described in the specification.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 9, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Yasuhiro Yoshioka, Masakazu Morigaki
  • Patent number: 5514531
    Abstract: There is disclosed a silver halide color photographic material which comprises an acylacetamide yellow dye-forming coupler represented by the following formula (I) and a compound represented by the following formula (II) or (III): ##STR1## wherein R.sub.1 represents a monovalent group, Q represents a group of non-metallic atoms required to form together with the C a 3- to 5-membered cyclic hydrocarbon group or a 3- to 5-membered heterocyclic group, and Y.sub.R represents a residue remaining after removing the acyl group from the acylacetamide yellow dye-forming coupler represented by formula (I), provided that R.sub.1 is not a hydrogen atom and does not bond to Q to form a ring, ##STR2## wherein R.sub.a1, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.a5 each represent a hydrogen atom, or a substituent such as an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a cyano group, a halogen atom, or a nitro group, provided that R.sub.a1, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: May 7, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akiko Shono, Nobuo Seto
  • Patent number: 5429918
    Abstract: A silver halide color photographic material contains at least one hydroxypyridine compound of formulae (A), (B) and (C) in at least one layer on the support: ##STR1## The material is capable of providing a color image having an improved fastness to light.
    Type: Grant
    Filed: August 19, 1993
    Date of Patent: July 4, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Masakazu Morigaki
  • Patent number: 5419996
    Abstract: Disclosed is a color diffusion transfer photosensitive material containing a compound represented by a color diffusion transfer photosensitive material containing at least one compound represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom, an aliphatic group or an aryl group; and R.sub.3 represents an aliphatic group or a group represented by the following general formula (Ab): ##STR2## wherein R.sub.4 represents a hydrogen atom, an aliphatic group or an aryl group and R.sub.5 represents an aliphatic group, an aryl group or an amino group; and further, R.sub.1 and R.sub.2, R.sub.1 and R.sub.3, R.sub.2 and R.sub.3, or R.sub.4 and R.sub.5 may combine with each other to form a 5- to 7-membered ring, or R.sub.1, R.sub.2 and R.sub.3 may combine with one another to form a bicyclo ring; wherein the total number of carbon atoms contained in R.sub.1, R.sub.2 and R.sub.3 is not smaller than 10, at least either R.sub.1 or R.sub.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: May 30, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideaki Naruse, Nobuo Seto, Masakazu Morigaki, Masayuki Negoro
  • Patent number: 5418122
    Abstract: A silver halide color photographic material is disclosed which comprises a support having thereon at least one layer containing at least one compound of the following general formula: ##STR1## wherein R.sub.1 represents a hydrogen atom, an aliphatic group, --C(.dbd.O)--R.sub.7, --S(.dbd.O)2--R.sub.8 or --P(.dbd.O)(R.sub.7)(R.sub.9); R.sub.2 and R.sub.3 each represents --O--R.sub.10, --S--R.sub.10, an acylamino group or an aliphatic group; R.sub.4 represents --C(.dbd.O)--R.sub.11 or a heterocyclic group; R.sub.5 and R.sub.6 each represents a hydrogen atom or a substituent group; R.sub.7 and R.sub.9 each represents an aliphatic group, an aliphatic oxy group, an aryl group or an aryloxy group; R.sub.8 represents an aliphatic group or an aryl group; R.sub.10 represents an aliphatic group or --C(.dbd.O)--R.sub.7 ; and R.sub.11 represents a substituted hydrazino group or a heterocyclic group.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: May 23, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Yasuhiro Yoshioka, Masakazu Morigaki
  • Patent number: 5411846
    Abstract: A novel silver halide color photographic material comprising a support provided thereon at least one layer containing at least one compound represented by the following general formula (A): ##STR1## In the formula, L.sub.1 represents an alkylene or arylene group; R.sub.1 represents a substituent which can be substituted for a hydrogen of the benzene ring; m represents an integer 2 to 7; and n is 0 or an integer of 1 to 4, with the proviso that when either or both of m and n are at least two, the plurality of L.sub.1 groups and/or R.sub.1 groups may be the same or different, and with the proviso that the compound of formula (A) does not form a polymer via an R.sub.1 group. In a preferred embodiment, at least one compound represented by formula (A) is incorporated into a photographic silver halide emulsion layer.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: May 2, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Yasuhiro Yoshioka, Masakazu Morigaki
  • Patent number: 5399473
    Abstract: There is disclosed a silver halide color photographic material which comprises one yellow coupler represented by the following formula (1) or (2), and a compound represented by the following formula (3) or (4). ##STR1## wherein X.sup.1 and X.sup.2 each represent an alkyl group, an aryl group, or a heterocyclic group, X.sup.3 represents an organic residue required to form a nitrogen-containing heterocyclic group together with the >N--, Y represents an aryl group or a heterocyclic group, and Z represents a group capable of being released upon a coupling reaction with the oxidized product of a developing agent, ##STR2## wherein R.sub.a1, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.a5 each represent a hydrogen atom, or a substituent such as an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a cyano group, a halogen atom, or a nitro group, provided that R.sub.al, R.sub.a2, R.sub.a3, R.sub.a4, and R.sub.a5 are not hydrogen atoms at the same time, ##STR3## wherein R.sub.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: March 21, 1995
    Assignee: Fuji Photo Film Company, Ltd.
    Inventors: Akiko Shono, Nobuo Seto
  • Patent number: 5380631
    Abstract: A silver halide color photographic light-sensitive material having at least one negative silver halide emulsion layer on a support, wherein the silver halide color photographic light-sensitive material contains at least one type of a compound which reacts with the oxidized form of a developing agent to release a development inhibitor or a precursor of a development inhibitor and/or at least one type of a compound which cleaves after reacting with the oxidized form of a color developing agent, the cleaved compound of which in turn reacts with another molecule of the oxidized form of a color developing agent to cleave a development inhibitor, and contains at least one type of a compound selected from Formulas (A) and (B) below. In Formulas (A) and (B), each of R.sub.a1 to R.sub.a5 and R.sub.b1 to R.sub.b5 represents a hydrogen atom, an alkyl group or other groups. R.sub.a1 to R.sub.a5 are not simultaneously hydrogen atoms, and one or two of R.sub.b2 to R.sub.b5 are hydroxyl groups.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: January 10, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Nozawa, Nobuo Seto, Nobutaka Ohki, Masayoshi Toyoda
  • Patent number: 5362617
    Abstract: A light-sensitive material comprising a support provided thereon at least one layer containing a coupler represented by the following Formula (I): ##STR1## wherein A represents a group represented by the following Formula (a), (b) or (c): ##STR2## wherein the groups are as defined in the specification provided that at least one of the groups represented by A, B and Z has at least one of the partial structures represented by the following Formulas (P-I) to (P-V): ##STR3## wherein the substituent groups are as defined in the specification.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: November 8, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Kohzaburoh Yamada, Nobuo Seto, Yasuhiro Yoshioka
  • Patent number: 5352573
    Abstract: A silver halide color photographic light-sensitive material having an improved color forming property, color reproducibility and image preservative performance is described. The light-sensitive material comprises a support having provided thereon at least one silver halide emulsion layer comprising (a) a cyan dye-forming coupler represented by the following formulas (I) or (II): ##STR1## wherein Za, Zb, R.sub.1, R.sub.2 and X represent substituents described herein; (b) a compound represented by the following formula (A): ##STR2## wherein R.sub.a1 -R.sub.a6 represent substituents described herein.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: October 4, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Yasuhiro Yoshioka, Makoto Suzuki, Masakazu Morigaki
  • Patent number: 5352572
    Abstract: A silver halide color photographic material comprises a combination of at least one yellow dye-forming coupler of the following general formula (1) with at least one discoloration inhibitor of special amide, phosphorus or hydrazine compound type to prevent the dye images, especially the yellow dye image, formed therein from discoloring or changing their colors; ##STR1## wherein X.sup.3 represents an organic residue completing a nitrogen-containing heterocyclyl group together with ##STR2## Y represents an aromatic or heterocyclic group; and Z represents a group capable of splitting off when the coupler represented by the foregoing formula reacts with the oxidation product of an aromatic primary amine color developing agent.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: October 4, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Seto, Akira Ogawa, Masakazu Morigaki
  • Patent number: 5342747
    Abstract: Disclosed is a silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing a pyrrolotriazole cyan coupler and a specific lipophilic compound. The color photographic material have improved color reproducibility and preservability.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: August 30, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Yasuhiro Yoshioka, Nobuo Seto
  • Patent number: 5330888
    Abstract: A silver halide color photographic material comprises a support having thereon at least one silver halide emulsion layer. At least one layer of silver halide emulsion layer contains at least one pyrrolotriazole cyan coupler of formula (I) or (II) and at least one lipophilic compound selected from the group consisting of phenol compounds of formula (A), sulfur peroxide compounds of formula (B) and amide compounds of formula (C): ##STR1## wherein the substituents are as defined in the specification.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: July 19, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Yasuhiro Yoshioka, Nobuo Seto
  • Patent number: 5324626
    Abstract: There is disclosed a silver halide color photographic material, which comprises a compound represented by formula (I) in a photosensitive layer or a non-photosensitive layer and a yellow dye-forming coupler represented by formula (II), (III), or (IV) in a blue-sensitive silver halide emulsion layer: ##STR1## wherein R.sub.1 represents an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a silyl group, an acyl group, a sulfonyl group, or an R.sub.o group; R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 each represent a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an aryl group, a substituted amino group, an alkylthio group, an arylthio group, an R.sub.p group, an R.sub.q group, an R.sub.r group, an R.sub.s group, an R.sub.t group, or an R.sub.u group; R.sub.1a, R.sub.1b, and R.sub.1c have the same meaning as that of R.sub.1 ; R.sub.2 and R.sub.3, R.sub.3 and R.sub.4, or R.sub.5 and R.sub.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: June 28, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akiko Shono, Nobuo Seto
  • Patent number: 5304463
    Abstract: There is disclosed a silver halide color photographic material having photosensitive layers and non-photosensitive layers adjacent to photosensitive layers on a base, which comprises a yellow dye-forming coupler selected from a group consisting of couplers represented by formulas (I), (II), and (III) and a compound represented by the following formula (IV): ##STR1## wherein R.sub.1 represents a monovalent group, Q represents a group of non-metallic atoms required to form together with the C a cyclic hydrocarbon group or a heterocyclic group that has a heteroatom of N, S, O, or P, and Y.sub.R represents a residue remaining after removing the acyl group ##STR2## from the coupler represented by formula (I), provided that R.sub.1 is not a hydrogen atom and does not bond to Q to form a ring, ##STR3## wherein X.sup.1, and X.sup.2 each represent an alkyl group, an aryl group, or a heterocyclic group, X.sup.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: April 19, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takehiko Sato, Nobuo Seto