Patents by Inventor Kouta Fukui

Kouta Fukui 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).

  • Publication number: 20080241762
    Abstract: A photothermographic material including at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for thermal development, and further including at least two dyes having maximum absorption wavelengths different from each other, wherein the difference between the maximum absorption wavelengths is from 10 nm to 50 nm, a maximum absorption wavelength of a first dye corresponds to a wavelength of a first laser for imagewise exposure, and a maximum absorption wavelength of a second dye corresponds to a wavelength of a second laser for imagewise exposure. Moreover, an image forming method using a sheet of the photothermographic material, wherein a part of the sheet is imagewise exposed using a laser while another part of the sheet that has already been imagewise exposed is thermally developed, and a distance between the exposure portion and thermal developing portion is 50 cm or less, is provided.
    Type: Application
    Filed: February 14, 2008
    Publication date: October 2, 2008
    Applicant: FUJIFILM CORPORATION
    Inventor: Kouta Fukui
  • Patent number: 7407741
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a first non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer including a second non-photosensitive organic silver salt which is different from the first non-photosensitive organic silver salt, wherein particles of the second non-photosensitive organic silver salt have a mean equivalent circular diameter of from 0.03 ?m to 0.5 ?m. A photothermographic material, which exhibits improved color tone of developed silver images, improved resistance to damage from fingerprints, and high resistance to image defects, is provided.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: August 5, 2008
    Assignee: Fujifilm Corporation
    Inventor: Kouta Fukui
  • Patent number: 7402380
    Abstract: A photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, wherein 1) the binder includes a polymer latex having a monomer component represented by formula (M): CH2?CR01—CR02?CH2??Formula (M) 2) the photothermographic material includes a compound represented by formula (SA): and 3) the photothermographic material further includes a metal phthalocyanine dye represented by formula (PC-1): wherein at least one of R1, R4, R5, R8, R9, R12, R13, and R16 is an electron-attracting group. The invention provides a photothermographic material which produces an image free from unevenness in color tone, having high image quality, and is excellent in image storability.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: July 22, 2008
    Assignee: FUJIFILM Corporation
    Inventor: Kouta Fukui
  • Patent number: 7396641
    Abstract: The present invention provides a black and white photothermographic material having, on at least one side of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for silver ions, wherein the reducing agent for silver ions is a compound represented by the following formula (PP) and having a molecular weight of from 450 to 3000, and the black and white photothermographic material further comprises a compound represented by the following formula (II).
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: July 8, 2008
    Assignee: Fujifilm Corporation
    Inventor: Kouta Fukui
  • Publication number: 20080076078
    Abstract: The present invention provides a black and white photothermographic material having, on at least one side of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for silver ions, wherein the reducing agent for silver ions is a compound represented by the following formula (PP) and having a molecular weight of from 450 to 3000, and the black and white photothermographic material further comprises a compound represented by the following formula (II).
    Type: Application
    Filed: September 14, 2007
    Publication date: March 27, 2008
    Applicant: FUJIFILM CORPORATION
    Inventor: Kouta Fukui
  • Publication number: 20080057449
    Abstract: The present invention provides a black and white photothermographic material including, on at least one side of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, a color developing agent, and a coupler, wherein the black and white photothermographic material includes at least two image forming layers including the photosensitive silver halide, in which a first image forming layer includes at least the reducing agent for silver ions, a second image forming layer includes at least the color developing agent, and a sensitivity difference between the first image forming layer and the second image forming layer is 0.2 or more when expressed by log E0 as a logarithmic value of an exposure value (E0) necessary for obtaining a one-half density for the sum of maximum density and fog.
    Type: Application
    Filed: July 5, 2007
    Publication date: March 6, 2008
    Applicant: FUJIFILM CORPORATION
    Inventors: Katsuhisa Ohzeki, Yasuaki Deguchi, Yasuhiro Yoshioka, Kouta Fukui
  • Patent number: 7279273
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a first non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer including a second non-photosensitive organic silver salt that is different from the first non-photosensitive organic silver salt on the same side of the support as the image forming layer and farther from the support than the image forming layer, wherein the photothermographic material further has a non-photosensitive intermediate layer between the image forming layer and the non-photosensitive layer, and 50% by weight or more of a binder in the non-photosensitive intermediate layer is a polymer latex. A photothermographic material, which exhibits improved image storability and improved resistance to image defects, is provided.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: October 9, 2007
    Assignee: Fujifilm Corporation
    Inventor: Kouta Fukui
  • Publication number: 20070231754
    Abstract: The present invention provides a black and white photothermographic material having, on at least one side of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a color developing agent, and a coupler which reacts with an oxidation product of the color developing agent to form a dye, wherein a mean particle size of the non-photosensitive organic silver salt is 0.38 ?m or less. A black and white photothermographic material which exhibits high sensitivity, high density, excellent image tone, and excellent coating ability is provided.
    Type: Application
    Filed: March 20, 2007
    Publication date: October 4, 2007
    Inventors: Katsuhisa Ohzeki, Yasuaki Deguchi, Kouta Fukui, Yasuhiro Yoshioka
  • Publication number: 20070196779
    Abstract: The present invention provides a black and white photothermographic material including, on at least one side of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, a color developing agent, and a coupler which reacts with an oxidation product of the color developing agent to form a dye, wherein a total amount of ammonia included on one side of the support having thereon the photosensitive silver halide is from 5 mg/m2 to 25 mg/m2, and an optical density of an image formed by imagewise exposing and thermally developing the black and white photothermographic material satisfies the following equation (A): 0.02<Dc<D/4 ??Equation (A) wherein D represents an optical density in a range of from 1 to 2, and Dc represents an optical density obtained by the dye in the optical density of the image.
    Type: Application
    Filed: January 25, 2007
    Publication date: August 23, 2007
    Inventors: Kouta Fukui, Katsuhisa Ohzeki, Yasuaki Deguchi, Yasuhiro Yoshioka
  • Publication number: 20070196778
    Abstract: The present invention provides a black and white photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide and a non-photosensitive organic silver salt, and a non-photosensitive layer including at least a coupler, wherein at least one of the image forming layer and the non-photosensitive layer includes a color developing agent; a grain density of the photosensitive silver halide in the image forming layer is from 20 grains/?m3 to 103 grains/?m3; and an optical density of an image formed by imagewise exposing and thermally developing the black and white photothermographic material satisfies the following equation (A): 0.02<Dc<D/4 ??Equation (A) wherein D represents a value of an optical density in a range of from 1.0 to 2.0; and Dc represents an optical density obtained by the dye in the optical density of the image.
    Type: Application
    Filed: December 14, 2006
    Publication date: August 23, 2007
    Inventors: Katsuhisa Ohzeki, Yasuaki Deguchi, Kouta Fukui, Yasuhiro Yoshioka
  • Publication number: 20070196777
    Abstract: The present invention provides a black and white photothermographic material having, a first image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for silver ions, wherein the black and white photothermographic material further has a second image forming layer including at least a coupler, and at least one of the first image forming layer and the second image forming layer includes a color developing agent. A black and white photothermographic material which exhibits high sensitivity, excellent image tone, and excellent storage stability is provided.
    Type: Application
    Filed: December 1, 2006
    Publication date: August 23, 2007
    Inventors: Yasuaki Deguchi, Kouta Fukui, Katsuhisa Ohzeki, Masahiko Taniguchi, Yasuhiro Yoshioka
  • Patent number: 7232652
    Abstract: A photothermographic material including, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a first organic silver salt, a reducing agent, and a binder, and at least one non-photosensitive layer which is disposed on the same side as the image forming layer and farther from the support than the image forming layer, wherein 50% or more of a total projected area of the photosensitive silver halide is occupied by tabular grains having a silver iodide content of 40 mol % or higher and an aspect ratio of 2 or more, and the non-photosensitive layer comprises a second organic silver salt, and an image forming method using the same. The invention provides a photothermographic material and an image forming method excellent in image tone and image storability.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: June 19, 2007
    Assignee: Fujifilm Corporation
    Inventor: Kouta Fukui
  • Patent number: 7229753
    Abstract: A photothermographic material comprising at least (a) a photosensitive silver halide, (b) a reducible silver salt, (c) a reducing compound represented by the following general formula (1), and (d) a binder: Q1—NHNH—R1: ??Formula (1) wherein, in the general formula (1), Q1 represents a 5- to 7-membered unsaturated ring bonding to NHNH—R1 at a carbon atom, and R1 represents a carbamoyl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfonyl group or a sulfamoyl group, provided that when R1 is propylcarbamoyl group, Q1 is not 2,3,5,6-tetrachloro-4-cyanophenyl group. According to the present invention, there is provided a novel photothermographic materials showing high sensitivity, high development speed and little fluctuation of performance due to heat development temperature variation.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: June 12, 2007
    Assignee: Fujifilm Corporation
    Inventors: Toyohisa Oya, Kouta Fukui, Yasuhiro Yoshioka, Kazunobu Katoh
  • Patent number: 7208264
    Abstract: A photothermographic material wherein at least an image-forming layer on at least one surface of a support, the image-forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, wherein, an outermost layer is provided as a layer most remote from the support on the side of the support where the image-forming layer is provided, a non-photosensitive intermediate layer A containing a binder and provided in adjacent with the image-forming layer and between the image-forming layer and the outermost layer, wherein the binder of the non-photosensitive intermediate layer A contains 80% by mass or more of a polymer formed by copolymerizing a monomer represented by Formula (M), a non-photosensitive intermediate layer B containing a binder and provided between the non-photosensitive intermediate layer A and the outermost layer, and the binder of the non-photosensitive intermediate layer B contains 50% by mass or more of a hydrophilic polymer derive
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: April 24, 2007
    Assignee: FujiFilm Corporation
    Inventors: Keiichi Suzuki, Kouta Fukui, Minoru Sakai
  • Publication number: 20070082303
    Abstract: The present invention provides a silver salt particle of a nitrogen-containing heterocyclic compound having a shape of A or B, and a photothermographic material including at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent, wherein the non-photosensitive organic silver salt is a silver salt particle of a nitrogen-containing heterocyclic compound having the shape of A or B: A) a rectangular particle in which a major axis a, a medium axis b, and a minor axis c of the rectangle satisfy a?b, and a ratio of the medium axis b to the minor axis c (b/c) is from 1.1 to 10; B) a rod-like particle in which a cross section of the rod is circular or elliptic, and a major axis d of the rod and an equivalent circular diameter e of the cross section of the rod satisfy d/e>2.
    Type: Application
    Filed: September 25, 2006
    Publication date: April 12, 2007
    Inventors: Hiroyuki Mifune, Kouta Fukui
  • Publication number: 20070072135
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a first non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer including a second non-photosensitive organic silver salt that is different from the first non-photosensitive organic silver salt on the same side of the support as the image forming layer and farther from the support than the image forming layer, wherein the photothermographic material further has a non-photosensitive intermediate layer between the image forming layer and the non-photosensitive layer, and 50% by weight or more of a binder in the non-photosensitive intermediate layer is a polymer latex. A photothermographic material, which exhibits improved image storability and improved resistance to image defects, is provided.
    Type: Application
    Filed: August 21, 2006
    Publication date: March 29, 2007
    Inventor: Kouta Fukui
  • Publication number: 20070065763
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, wherein the photothermographic material includes a cyan color-forming compound, a maximum density of an image obtained after thermal development is 4.0 or more, and a gradation on a photographic characteristic curve is from 1.0 to 4.5. A photothermographic material, which has high image density and favorable gradation and is suitable for mammography, is provided.
    Type: Application
    Filed: August 3, 2006
    Publication date: March 22, 2007
    Inventor: Kouta Fukui
  • Publication number: 20070031766
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a first non-photosensitive organic silver salt, a reducing agent, and a binder, and a non-photosensitive layer including a second non-photosensitive organic silver salt which is different from the first non-photosensitive organic silver salt, wherein particles of the second non-photosensitive organic silver salt have a mean equivalent circular diameter of from 0.03 ?m to 0.5 ?m. A photothermographic material, which exhibits improved color tone of developed silver images, improved resistance to damage from fingerprints, and high resistance to image defects, is provided.
    Type: Application
    Filed: July 17, 2006
    Publication date: February 8, 2007
    Inventor: Kouta Fukui
  • Publication number: 20070031767
    Abstract: The present invention provides a photothermographic material having, on at least one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a first reducing agent for silver ions, and a first binder, and a non-photosensitive outermost layer which is disposed on the same side of the support as the side having thereon the image forming layer, wherein the photothermographic material further has a non-photosensitive intermediate layer A between the image forming layer and the outermost layer, and the non-photosensitive intermediate layer A includes at least a second reducing agent for silver ions and a second binder. A photothermographic material which gives an image with high image quality and has improved film physical properties is provided.
    Type: Application
    Filed: July 28, 2006
    Publication date: February 8, 2007
    Inventors: Takayoshi Oyamada, Kouta Fukui, Itsuo Fujiwara
  • Publication number: 20070031765
    Abstract: The present invention provides a black and white photothermographic material including at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a binder on a support, wherein the black and white photothermographic material contains a reducing agent represented by formula (1) and a coupler which reacts with an oxidation product of the reducing agent to form a dye and is represented by formula (2), (3), (4), or (5); and a density obtained by the dye at a maximum absorption wavelength of the dye is from 0.005 to 0.5 when an image density is 2.0. A photothermographic material which exhibits excellent image tone and excellent image storage stability is provided.
    Type: Application
    Filed: May 31, 2006
    Publication date: February 8, 2007
    Inventors: Kouta Fukui, Yasuhiro Yoshioka