Patents by Inventor Kiyoshi Nakazyo

Kiyoshi Nakazyo 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: 5719015
    Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide light-sensitive layer and at least one light-insensitive layer, wherein the support comprises a poly(alkylene aromatic dicarboxylate) having a glass transition temperature of from 50.degree. C. to 200.degree. C. and is heat-treated at a temperature of not lower than 40.degree. C., but lower than the glass transition temperature for 0.1 to 1500 hours after molding the polymer into the support and before the coating of the silver halide light-sensitive layer, and said at least one light-insensitive layer contains a dispersion of crystallites of at least one dye represented by general formula (I):D--(X).sub.y (I)wherein D represents a moiety having a chromophoric group; X represents a dissociable proton or a group having a dissociable proton which is bonded to D either directly or through a bivalent bonding group; and y represents an integer of 1 to 7.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: February 17, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Kiyoshi Nakazyo
  • Patent number: 5474886
    Abstract: A silver halide color photographic material is disclosed which comprises a support having thereon at least one light-sensitive silver halide emulsion layer. The silver halide color photographic material contains a developing solution-deactivated type timing DIR which forms either a nondiffusing dye or a dye dissolved out from the light-sensitive material during development and an acylacetamide type coupler having a specific acyl group and/or an N,N-substituted linear or cyclic malondiamide type coupler.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: December 12, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Nakazyo, Keiji Mihayashi, Seiji Ichijima, Toshio Kawagishi
  • Patent number: 5474883
    Abstract: A silver halide color photographic material comprising a support having provided thereon a layer containing an acylacetamide-type coupler having an acyl group represented by the following formula (YI) and/or a coupler represented by the following formula (1) or (2), wherein the support is made of a poly(alkylene aromatic dicarboxylate) and has a glass transition point of from 50.degree. C. to 200.degree. C. and is heat-treated at a temperature falling within the range from 40.degree. C. to lower than the glass transition point before or after having been coated with a subbing layer and before being coated with silver halide light-sensitive layers, ##STR1## wherein R.sub.1 represents a substituent; and Q represents a non-metallic atomic group necessary for forming, along with C in the formula, a 3-membered to 5-membered hydrocarbon ring or a 3-membered to 6-membered hetero ring having in the ring structure at least one hetero atom selected from among N, O, S and P, ##STR2## wherein X.sub.1 and X.sub.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: December 12, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Kiyoshi Nakazyo
  • Patent number: 5330887
    Abstract: A silver halide color photographic material comprising a support having on one side thereof at least one silver halide emulsion layer corresponding to each of the colors cyan, magenta, and yellow in which each of the colors cyan, magenta and yellow, respectively, are formed, wherein the layer which forms a magenta color is a green sensitive layer comprising (A) at least one coupler represented by formula (I) or formula (II) below ##STR1## wherein R.sub.1, R.sub.2, R'.sub.2 and X are as defined in the above specification and (B) silver halide grains which have been spectrally sensitized in such a way that they have a peak sensitivity between 540 nm and 555 nm by at least one spectrally sensitizing dye represented by the formulae (A), (B) and (C) below ##STR2## wherein W.sub.1, W.sub.2, V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, R.sub.21, R.sub.22, R.sub.23, R.sub.24, R.sub.25, R.sub.26, R.sub.27, R.sub.28, R.sub.29, Y, X.sub.1, X.sub.2, X.sub.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: July 19, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazunori Hasebe, Kiyoshi Nakazyo
  • Patent number: 5328818
    Abstract: A silver halide color photographic light-sensitive material includes red-, green- and blue-sensitive silver halide emulsion layers, and a non-light-sensitive layer, and contains a dye of the following formula (I). The emulsion layer or the non-light-sensitive layer contains a yellow coupler of the following formula (1) or (2), or an acylacetamide type yellow coupler having an acyl group of the following formula (Y): ##STR1## where X and Y represent an electron attractive group, or when coupled with each other, XY represents an acidic nucleus, Ar represents a phenyl group or a heterocyclic group, and L.sup.1, L.sup.2 and L.sup.3 represent a methine group, ##STR2## where X.sub.1 and X.sub.2 represent an alkyl group, an aryl group, or a heterocyclic group, X.sub.3 represents an organic group which forms a nitrogen-containing heterocyclic group together with >N--, Y represents an aryl group or a heterocyclic group, and Z represents a split-off group, ##STR3## where D.sup.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: July 12, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Fukuzawa, Kohzaburoh Yamada, Keiji Mihayashi, Koji Tamoto, Shigeru Shibayama, Minoru Sato, Kiyoshi Nakazyo
  • Patent number: 5128238
    Abstract: A method for producing color images comprising developing a negative silver halide color photographic materials and an internal latent-image type direct positive silver halide color photogaphic material, with the same developer having a pH of 9.0 to 11.5, said direct positive photographic material containing at least one compound represented by formula (N-I) as nucleating agent and at least one compound represented by (I) or (II) as magenta coupler, thereby ensuring high color reproducibility to both photographic materials: ##STR1## wherein the symbols and substituents of said formulae are as defined in the specification.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: July 7, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Nakazyo, Shinji Ueda, Akira Abe, Noriyuki Inoue
  • Patent number: 5093227
    Abstract: There is disclosed a method for processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent. In the method a silver halide color photographic material which comprises a pyrazoloazole-type coupler and an image-dye stabilizer, and has at least one of the layers comprising a silver halide emulsion of a high silver chloride and the total coating amount of silver of 0.75 g/m.sup.2 or below is processed, after exposure to light, with a color developer containing a specified amount of chloride ions and bromide ions, to improve development treatment characteristics, desilvering ability, and stability of an image.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: March 3, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Nakazyo, Kazuaki Yoshida
  • Patent number: 5063143
    Abstract: A process for forming a color image wherein a color photographic material is developed with a processing solution containing a solvent for the silver halide in the presence of an aromatic primary amino color devloping agent. The color photographic material comprises, on a support, at least one layer containing (1) a coupler capable of forming a dye by reaction with an oxidized aromatic primary amino color developing agent and having a dye covering power of at least 0.75 and (2) a silver chlorobromide emulsion or silver chlorobromide emulsion containing at least 90 molar % of silver chloride.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: November 5, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Hirose, Akira Abe, Kiyoshi Nakazyo
  • Patent number: 5002861
    Abstract: A method for processing a silver halide color photographic material is disclosed, comprising the step of:(a) developing an imagewise exposed silver halide color photographic material with a color developing solution comprising not less than 1.9.times.10.sup.-2 mol/liter of a color developing agent; and(b) desilvering said developed material with a bleaching solution comprising not less than 0.2 mol/liter of a (1,3-diaminopropanetetraacetato)iron (III) complex salt and having a pH of from 2.5 to 5.5. The method achieves rapid processing without impairing image preservability after processing.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: March 26, 1991
    Assignee: Fuji Photo Film Co. Ltd.
    Inventors: Kiyoshi Nakazyo, Yoshihiro Fujita
  • Patent number: 5001041
    Abstract: A method for processing a silver halide color photographic material for prints comprising a color developing step, a bleach-fixing step, and either a stabilizing step or a water washing step is described, wherein the silver halide color photographic material comprises a reflective support having thereon at least one silver halide emulsion layer containing a silver halide having a silver chloride content of not less than 90 mol % and substantially not containing silver iodide, and the color developing step is conducted using a processing solution that does not substantially contain benzyl alcohol.According to the method of the present invention, the amount of water required in a water washing step or a stabilizing step can be greatly reduced without decreasing liquid stability of the water for washing or the stabilizing solution, and color prints having improved preservability are obtained.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: March 19, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinzo Kishimoto, Shinji Ueda, Kiyoshi Nakazyo
  • Patent number: 4994359
    Abstract: The present invention relates to a silver halide color photographic light-sensitive material comprising (i) at least one 5-pyrazolone magenta coupler possessing an elimination group represented by general formula (I) in coupling posiitons, and (ii) at least one compound represented by general formula (A): ##STR1## wherein L.sub.1 and L.sub.2 each represents a methylene group or an ethylene group;l and m each represents 0 to 1;R.sub.1 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group;R.sub.2 represents a group linked to A by a carbon atom, an oxygen atom, a nitrogen atom or a sulfur atom;A represents a carbon atom or a sulfur atom;n represents 1 when A is a carbon atom, and 1 or 2 when A is a sulfur atom;B represents a carbon atom, an oxygen atom, a nitrogen atom or a sulfur atom;X represents an atomic group necessary for forming a ring;R.sub.1 and R.sub.2 may be mutually bonded and form a ring; and when B is a carbon atom or a nitrogen atom, B and R.sub.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: February 19, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Kiyoshi Nakazyo
  • Patent number: 4956268
    Abstract: A two-part bleach-fixing solution composition comprising of a first concentrate composition containing a reducing compound comprising a silver halide solvent and a preservative as main components; and a second concentrate composition having a pH of 1.5 or less, containing an oxidizing compound comprising a bleaching agent and an acid as main components.The invention also relates to a method for processing a silver halide color photographic material by the steps of:(a) developing an exposed silver halide color photographic material comprising a support having thereon at least one red-sensitive silver halide emulsion layer containing at least one coupler represented by formula (I) or (II); at least one green-sensitive silver halide emulsion layer containing at least one coupler represented by formula (III) or (IV); and at least one blue-sensitive silver halide emulsion layer containing a yellow coupler represented by formula (V): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: September 11, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Nakazyo, Takatoshi Ishikawa, Yoshikazu Fujita
  • Patent number: 4931382
    Abstract: A silver halide color photographic light-sensitive material containing a combination of a pyrazolo-azole magenta coupler and a specific dye image stabilizing agent is disclosed. The stabilizing agent is effective to improve fastness of a dye image formed by the coupler to light, heat and moisture.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: June 5, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Morigaki, Toshio Kawagishi, Kiyoshi Nakazyo, Nobuo Seto, Sadao Kamei
  • Patent number: 4900655
    Abstract: A silver halide color photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer, wherein at least one magenta coupler represented by the formula ##STR1## where the groups in the formula are defined in the specification; is dispersed in the silver halide emulsion layer in the presence of at least one high-boiling organic solvent represented by one of the formulae (II), (III), (IV) and (V): ##STR2## where the groups in the formulae are described in the specification. The a high boiling point organic solvent has a dielectric constant of not less than 4.00 at 25.degree. C. and 10 KHz.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: February 13, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Nakazyo, Takeshi Hirose, Genichi Hurusawa, Osamu Takahashi, Nobuo Furutachi, Hidetoshi Kobayashi
  • Patent number: 4882266
    Abstract: A silver halide color photographic material comprising a support having coated thereon at least one silver halide emulsion layer, in which said silver halide emulsion layer or a layer adjacent thereto contains a pyrazoloazole magenta coupler having at least one substituted alkyl group represented by the formula (I): ##STR1## wherein [A] represents a pyrazoloazole magenta coupler residual group; R.sup.1 is an alkyl group; R.sup.2 and R.sup.3 each is a hydrogen atom or a substituent, provided that both R.sup.2 and R.sup.3 are not hydrogen atoms at the same time; and n is 1, 2 or 3.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: November 21, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Kawagishi, Kiyoshi Nakazyo
  • Patent number: 4865963
    Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, said silver halide emulsion layer containing a pyrazoloazole series magenta coupler represented by general formula [I] ##STR1## wherein, R.sup.1 and R.sup.2 each represents a hydrogen atom or a substituent; and X represents a hydrogen atom or a releasing group which is released at the reaction with the oxidation product of an aromatic primary amine developing agent; at least one of said R.sup.1 and R.sup.2 is an alkyl group having a secondary or tertiary carbon atom directly bonded to the skeleton, at least one of said R.sub.1 and R.sub.2 is a sulfonamidoalkyl group or a sulfamoylalkyl group; and the magenta coupler may form a dimer or more polymer at the position of said R.sup.1, R.sup.2 or X.By the combined use of high boiling point organic solvent and ultraviolet absorbent, light fastness and coloring property are markedly improved.
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: September 12, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Furutachi, Tadahisa Sato, Seiki Sakanoue, Akio Mitsui, Minoru Sakai, Masakazu Morigaki, Hidetoshi Kobayashi, Nobuo Sakai, Kiyoshi Nakazyo, Takeshi Hirose, Toshio Kawagishi
  • Patent number: 4840878
    Abstract: A method for forming a color image is disclosed, which comprises imagewise exposing a multi-layer silver halide color photographic material comprising a reflective support having provided thereon at least three silver halide emulsion layers different in color sensitivity, each of which separately contains at least one coupler selected from a specific combination of cyan, magenta, and yellow couplers, and processing the exposed material with a color developing solution containing substantially no benzyl alcohol for a period of not more than 2 minutes and a half. A color image excellent in color reproducibility and preservability can be obtained rapidly without using benzyl alcohol.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: June 20, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Hirose, Nobuo Furutachi, Kozo Aoki, Kiyoshi Nakazyo, Genichi Furusawa
  • Patent number: 4822730
    Abstract: A silver halide color photographic material comprising a support having formed thereon at least one silver halide emulsion layer containing a pyrazoloazole series magenta coupler having at least one group expressed by the formula [S] below at a position other than the coupling active position.--(A).sub.n --L--B [S]wherein A represents a substituted or unsubstituted alkylene group, a substituted or unsubstituted cycloalkylene group, a substituted or unsubstituted arylene group, or a substituted or unsubstituted aralkylene group, in which in the main chain of said alkylene group, cycloalkylene group, arylene group, or aralkylene group, --O--, --S--, --CO--, --CO.sub.2 --, --OCO--, ##STR1## may be contained; L represents ##STR2## B represents a hydrogen atom or a substituted or unsubstituted alkyl or aryl group which does not contain therein --SO.sub.2 --; n is 0 or 1; and R and R' each represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.
    Type: Grant
    Filed: May 28, 1987
    Date of Patent: April 18, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Furutachi, Toshio Kawagishi, Kiyoshi Nakazyo
  • Patent number: 4783394
    Abstract: A color image forming process is described, which comprises developing an imagewise exposed silver halide color photographic material with a color developer containing an aromatic primary amine developing agent and being substantially free of benzyl alcohol for a period of up to about 2 minutes and 30 seconds, wherein the silver halide color photographic material comprises a reflective support having thereon a blue-sensitive silver halide emulsion layer containing a yellow color-forming coupler, a green-sensitive silver halide emulsion layer contaning a magenta color-forming coupler, and a red-sensitive silver halide emulsion layer containing a cyan color-forming coupler in this order, the material further containing light-insensitive hydrophilic colloid layers between the blue-sensitive silver halide emulsion layer and the green-sensitive silver halide emulsion layer and between the green-sensitive silver halide emulsion layer and the red-sensitive silver halide emulsion layer and at least one light-insensit
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: November 8, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Hirose, Kiyoshi Nakazyo, Hideaki Naruse
  • Patent number: 4741995
    Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer contains a silver halide emulsion which is spectrally sensitized by adding a spectral sensitizing dye prior to the completion of formation of silver halide particles and at least one kind of pyrazoloazole type magenta coupler represented by the following general formula (I): ##STR1## wherein R.sup.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, and when the Zb--Zc bond is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sup.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: May 3, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tadaaki Tani, Mikio Ihama, Kiyoshi Nakazyo