Patents by Inventor Yuko IWADATE

Yuko IWADATE 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: 20160291490
    Abstract: Provided is a fluorine-containing resin particle dispersion including: fluorine-containing resin particles, a resin which is not dissolved in at least one solvent in a group of hydroxyl group-containing solvents including an alcohol-based solvent having 1 to 10 carbon atoms, containing no aromatic ring in the molecule structure, and a water-based medium, and which is adhered on the surface of the fluorine-containing resin particles, and at least one solvent, in which the resin is not dissolved, in the group of hydroxyl group-containing solvents, in which the fluorine-containing resin particles having the resin adhered on the surface thereof are dispersed.
    Type: Application
    Filed: June 7, 2016
    Publication date: October 6, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Wataru YAMADA, Takatsugu DOI, Yuko IWADATE
  • Patent number: 9389525
    Abstract: Provided is a fluorine-containing resin particle dispersion including: fluorine-containing resin particles, a resin which is not dissolved in at least one solvent in a group of hydroxyl group-containing solvents including an alcohol-based solvent having 1 to 10 carbon atoms, containing no aromatic ring in the molecule structure, and a water-based medium, and which is adhered on the surface of the fluorine-containing resin particles, and at least one solvent, in which the resin is not dissolved, in the group of hydroxyl group-containing solvents, in which the fluorine-containing resin particles having the resin adhered on the surface thereof are dispersed.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: July 12, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Katsumi Nukada, Wataru Yamada, Takatsugu Doi, Yuko Iwadate
  • Patent number: 9310702
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an outermost surface layer of the electrophotographic photoreceptor is composed of a cured film of a composition containing a reactive charge transport material, a zinc stearate coverage of the surface of the outermost surface layer is 5.0% or more, and an oxygen permeability coefficient of the outermost surface layer before coating with zinc stearate is 2.0×1012 fm2/Pa·s or more.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: April 12, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kenji Kajiwara, Katsumi Nukada, Hidekazu Hirose, Yuko Iwadate
  • Publication number: 20160091804
    Abstract: An image forming method satisfies the following Expressions: 0.01<Rmf<0.20??Expression (A1) 0.005<Rmf/Wh<5.000??Expression (B1) 0.002<Rmf/Wl<1.000??Expression (B2) 1.0<Whmax/Whmin<2.5??Expression (C1) 1.0<Wlmax/Wlmin<2.5??Expression (C2) wherein, when a content of the fatty acid metal salt particles with respect to the entire weight of the toner is set as Rmf, an average abrasion rate of the electrophotographic photoreceptor is set as Wh, a maximum abrasion rate of the electrophotographic photoreceptor is set as Whmax, and a minimum abrasion rate of the electrophotographic photoreceptor is set as Whmin, and an average abrasion rate of the electrophotographic photoreceptor is set as Wl, a maximum abrasion rate of the electrophotographic photoreceptor is set as Wlmax, and a minimum abrasion rate of the electrophotographic photoreceptor is set as Wlmin.
    Type: Application
    Filed: January 22, 2015
    Publication date: March 31, 2016
    Inventors: Katsumi NUKADA, Hidekazu HIROSE, Tomoya SASAKI, Yuko IWADATE, Kenji KAJIWARA, Tatsuki SANO
  • Publication number: 20160085163
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an outermost surface layer of the electrophotographic photoreceptor is a cured film of a composition containing a reactive charge transporting material and silica particles having a hydrophobization-treated surface.
    Type: Application
    Filed: January 22, 2015
    Publication date: March 24, 2016
    Inventors: Kenji KAJIWARA, Katsumi NUKADA, Hidekazu HIROSE, Tomoya SASAKI, Yuko IWADATE, Tatsuki SANO
  • Patent number: 9235145
    Abstract: An electrophotographic photoreceptor includes a conductive substrate, and a photosensitive layer provided on the conductive substrate, and an outermost surface layer of the electrophotographic photoreceptor is constituted with a polymerized product or crosslinked product of a composition including at least one selected from reactive compounds represented by the formulae (I) and (II) and a non-reactive charge transporting material, a content of the non-reactive charge transporting material in the composition is from 5% by weight to 40% by weight based on the weight of the outermost surface layer, and a content of the unreacted reactive compound in the outermost surface layer after forming the outermost surface layer is 3% by weight or less based on the weight of the outermost surface layer.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: January 12, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Yuko Iwadate, Kenji Kajiwara
  • Patent number: 9188885
    Abstract: Provided is a reactive compound represented by the following General Formula (I): wherein in General Formula (I), F represents a charge transporting skeleton, D represents a group represented by the following General Formula (III), and m represents an integer of from 1 to 8: wherein in General Formula (III), L1 represents a divalent linking group including one or more —C(?O)—O— groups.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: November 17, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomoya Sasaki, Katsumi Nukada, Wataru Yamada, Takatsugu Doi, Yuko Iwadate, Kenji Kajiwara
  • Patent number: 9182687
    Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an outermost surface layer includes a cured film of a composition containing inorganic particles having polymerizable groups and at least one selected from the reactive compounds represented by the following formulae (I) and (II): wherein F represents a charge transporting skeleton; L represents a divalent linking group; and m represents an integer of 1 to 8, wherein F represents a charge transporting skeleton; L? represents an (n+1)-valent linking group; m? represents an integer of 1 to 6; and n represents an integer of 2 to 3.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 10, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomoya Sasaki, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Yuko Iwadate, Kenji Kajiwara
  • Publication number: 20150277245
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an outermost surface layer of the electrophotographic photoreceptor is composed of a cured film of a composition containing a reactive charge transport material, a zinc stearate coverage of the surface of the outermost surface layer is 5.0% or more, and an oxygen permeability coefficient of the outermost surface layer before coating with zinc stearate is 2.0×1012 fm2/Pa·s or more.
    Type: Application
    Filed: September 11, 2014
    Publication date: October 1, 2015
    Inventors: Kenji KAJIWARA, Katsumi NUKADA, Hidekazu HIROSE, Yuko IWADATE
  • Patent number: 9057972
    Abstract: An electrophotographic photoreceptor includes an electroconductive substrate, a photosensitive layer provided on the electroconductive substrate, and an outermost surface layer, wherein the outermost surface layer is a layer constituted with a cured product of a composition including at least one of non-charge transporting compounds represented by formulae (I) and (II), and at least one non-reactive charge transporting material:
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: June 16, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Yuko Iwadate, Kenji Kajiwara
  • Patent number: 9034544
    Abstract: Provided is a compound represented by the following Formula (I): wherein in Formula (I), F represents a charge transporting skeleton, L represents a divalent linking group including a —(CH2)n—O— group, m represents an integer of from 1 to 8, and n represents an integer of from 3 to 6.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: May 19, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Katsumi Nukada, Wataru Yamada, Tomoya Sasaki, Yuko Iwadate, Kenji Kajiwara
  • Patent number: 9034543
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; a charge generating layer provided on the conductive substrate; a charge transporting layer provided on the charge generating layer, which is configured to include a charge transporting material and a polycarbonate; and an outermost surface layer provided on the charge transporting layer, which is constituted with a cured film formed of a composition including a chain polymerizable compound having at least a charge transporting skeleton and a chain polymerizable functional group in the same molecule, and has an A value represented by the following equation (1) being from 0.1 to 0.3, and a B value represented by the following equation (2) being 0.02 or less, each of which is determined by an Attenuated total reflection Fourier transform infrared spectroscopy: A=(S1/S13)?(S0/S03)??Equation (1) B=S2/S23??Equation (2).
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: May 19, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yuko Iwadate, Wataru Yamada, Hidekazu Hirose, Kenji Kajiwara, Katsumi Nukada, Ryo Sekiguchi, Takayuki Ito
  • Patent number: 9005855
    Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate; a charge generating layer provided on the conductive substrate; a charge transporting layer provided on the charge generating layer; and an outermost surface layer provided on the charge transporting layer, wherein the charge transporting layer includes a charge transporting material and a polycarbonate copolymer having a solubility parameter as calculated by a Feders method of from 11.40 to 11.75, and the outermost surface layer includes a charge transporting material, fluorine-containing resin particles, and a fluorine-containing dispersant.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: April 14, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuko Iwadate, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Tomoya Sasaki, Kenji Kajiwara
  • Patent number: 8962225
    Abstract: A charge transporting film includes a cured film of a composition containing at least one selected from reactive compounds represented by the following Formula (I): wherein F represents a charge transporting skeleton, D represents a group represented by Formula (IIa), m represents an integer of from 1 to 8, E represents a group represented by Formula (IIb), L represents a (n+1)-valent linking group including two or more selected from the group consisting of an alkylene group, an alkenylene group, —C(?O)—, —N(R)—, —S—, —O—, and a trivalent or tetravalent group derived from alkane or alkene, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, n represents an integer of from 1 to 3, R0 represents a halogen atom, an alkyl group, or an alkoxy group, and n0 represents an integer of from 0 to 3.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 24, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tomoya Sasaki, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Kenji Kajiwara, Yuko Iwadate
  • Patent number: 8951701
    Abstract: Provided is a composition for forming a charge transporting film, including a solvent having a dielectric constant of 5.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: February 10, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yuko Iwadate, Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Tomoya Sasaki, Kenji Kajiwara
  • Patent number: 8900783
    Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; a photosensitive layer that is provided on the electroconductive substrate; and an outermost surface layer, wherein the outermost surface layer is a layer made of a cured product of a composition that contains position isomer mixture of at least one kind among non-charge transporting compounds represented by Formulae (I) and (II) and at least one kind among non-reactive charge transporting materials.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: December 2, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Wataru Yamada, Hidekazu Hirose, Yuko Iwadate, Kenji Kajiwara
  • Publication number: 20140321882
    Abstract: Provided is a composition for forming a charge transporting film, including a solvent having a dielectric constant of 5.
    Type: Application
    Filed: July 14, 2014
    Publication date: October 30, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuko IWADATE, Katsumi NUKADA, Wataru YAMADA, Hidekazu HIROSE, Tomoya SASAKI, Kenji KAJIWARA
  • Publication number: 20140295337
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; a charge generating layer provided on the conductive substrate; a charge transporting layer provided on the charge generating layer, which is configured to include a charge transporting material and a polycarbonate; and an outermost surface layer provided on the charge transporting layer, which is constituted with a cured film formed of a composition including a chain polymerizable compound having at least a charge transporting skeleton and a chain polymerizable functional group in the same molecule, and has an A value represented by the following equation (1) being from 0.1 to 0.3, and a B value represented by the following equation (2) being 0.02 or less, each of which is determined by an Attenuated total reflection Fourier transform infrared spectroscopy: A=(S1/S13)?(S0/S03)??Equation (1) B=S2/S23??Equation (2).
    Type: Application
    Filed: September 3, 2013
    Publication date: October 2, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yuko IWADATE, Wataru YAMADA, Hidekazu HIROSE, Kenji KAJIWARA, Katsumi NUKADA, Ryo SEKIGUCHI, Takayuki ITO
  • Patent number: 8846280
    Abstract: Provided is a compound represented by the following General Formula (I): wherein in General Formula (I), F represents a charge transporting subunit, L represents a linking group having a valency of (n+1) that is formed by combining two or more kinds selected from a group consisting of an alkylene group, —C?C— (an alkenylene group), —C(?O)—, —N(R)—, —O—, and —S—, and R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, m represents an integer of from 1 to 6, and n represents an integer of from 2 to 3.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: September 30, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Yuko Iwadate, Tomoya Sasaki, Kenji Kajiwara
  • Publication number: 20140255835
    Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; a photosensitive layer that is provided on the electroconductive substrate; and an outermost surface layer, wherein the outermost surface layer is a layer made of a cured product of a composition that contains position isomer mixture of at least one kind among non-charge transporting compounds represented by Formulae (I) and (II) and at least one kind among non-reactive charge transporting materials.
    Type: Application
    Filed: August 22, 2013
    Publication date: September 11, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Wataru YAMADA, Hidekazu HIROSE, Yuko IWADATE, Kenji KAJIWARA