Patents by Inventor Kazuhiro Koseki

Kazuhiro Koseki 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: 12009158
    Abstract: Provided is a solid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: June 11, 2024
    Assignee: NIPPON CHEMI-CON CORPORATION
    Inventors: Kazuya Koseki, Kazuhiro Nagahara, Kazuma Okura
  • Publication number: 20240170226
    Abstract: Provide is an electrolytic capacitor for a middle-to-high voltage application that is equal to or higher than 100 V which suppresses the total amount of gas to be produced in the electrolytic capacitor. The anode foil of the electrolytic capacitor includes an enlarged surface portion provided with tunnel-shape pits formed from the foil surface in the thickness direction of the foil, and a dielectric oxide film formed on the surface of the enlarged surface portion. The cathode body of the electrolytic capacitor includes a cathode foil formed of a valve acting metal, and a carbon layer formed on the cathode foil.
    Type: Application
    Filed: December 29, 2023
    Publication date: May 23, 2024
    Inventors: Atsushi YOSHIDA, Makoto TOMINAGA, Kazuhiro NAGAHARA, Kazuya KOSEKI, Tatsuru HATAE
  • Patent number: 11948755
    Abstract: An electrode body which achieves not only high initial capacitance of an electrolyte capacitor but also achieves stable capacitance even after being exposed to high temperature environment, and the electrolyte capacitor including the electrode body are provided. The electrode body is used for a negative electrode of the electrolyte capacitor, and the electrode body includes a negative electrode foil formed by a valve action metal, and a carbon layer formed on the negative electrode foil. The carbon layer includes a first spherical carbon and a second spherical carbon, and the first spherical carbon has a BET specific surface area larger than the second spherical carbon.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: April 2, 2024
    Assignee: NIPPON CHEMI-CON CORPORATION
    Inventors: Kazuya Koseki, Kazuma Okura, Kazuhiro Nagahara
  • Publication number: 20240105393
    Abstract: A cathode and an electrolytic capacitor including the cathode which can suppress production of hydrogen gas are provided. The cathode of the electrolytic capacitor includes cathode foil formed of valve action metal and a conductive layer formed on a surface of the cathode foil. A natural immersion potential of the cathode foil when immersed in an electrolyte solution is at a higher side than a natural immersion potential of reference cathode foil formed of the valve action metal with purity of 99.9%.
    Type: Application
    Filed: November 18, 2023
    Publication date: March 28, 2024
    Inventors: Kazuhiro NAGAHARA, Tatsuru HATAE, Kazuya KOSEKI, Atsushi YOSHIDA, Makoto TOMINAGA
  • Patent number: 11932657
    Abstract: Provided is a novel heterocyclic compound having an aryl hydrocarbon receptor antagonist activity and useful for the promotion of platelet production, the compound being represented by the general formula [I]: wherein ring A, ring B, R1, R2, R3, R4, n, and X are as defined above, or a salt thereof.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: March 19, 2024
    Assignee: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Kazuhiro Ohdachi, Yusuke Fujimori, Naoya Makita, Noritaka Koseki, Hideki Hayashi, Yuki Sakamoto, Kurumi Mineno, Ryosuke Taga
  • Patent number: 11929214
    Abstract: Provided is a hybrid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: March 12, 2024
    Assignee: NIPPON CHEMI-CON CORPORATION
    Inventors: Kazuya Koseki, Kazuhiro Nagahara, Kenji Machida
  • Publication number: 20230219667
    Abstract: A buoyancy adjuster includes: a buoyant portion detachably attached to a target object including a housing portion having a positive buoyancy, the buoyant portion having a neutral or negative buoyancy; and an orientation adjuster detachably attachable to the buoyant portion, the orientation adjuster configured to adjust orientation of the target object in a fluid. The orientation adjuster includes a weight portion detachably attached to a prescribed position of the buoyant portion, the weight portion having a negative buoyancy exceeding the positive buoyancy of the housing portion. A first height position of the housing portion relative to a second height position of the buoyant portion attaching the weight portion is lower than the first height position relative to the second height position of the buoyant portion without the weight portion in the fluid.
    Type: Application
    Filed: January 4, 2023
    Publication date: July 13, 2023
    Inventors: Atsushi KIKUCHI, Kazuhiro KOSEKI
  • Publication number: 20220128887
    Abstract: A buoyancy adjusting apparatus includes: a volume-changeable portion configured to be coupled to a buoyancy-adjustment target; and an operation receiver configured to receive an operation from a user to change a volume of the volume-changeable portion. The volume of the volume-changeable portion is changeable according to the operation received by the operation receiver, to change the buoyancy of the buoyancy-adjustment target in fluid.
    Type: Application
    Filed: September 15, 2021
    Publication date: April 28, 2022
    Inventor: Kazuhiro KOSEKI
  • Publication number: 20180081287
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a single-layer-type photosensitive layer on the conductive substrate. The single-layer-type photosensitive layer contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The product of a volume resistivity (G?·m) of the single-layer-type photosensitive layer and an elastic modulus (GPa) of the single-layer-type photosensitive layer is about 90 or more.
    Type: Application
    Filed: March 7, 2017
    Publication date: March 22, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hirofumi NAKAMURA, Yoshiteru YAMADA, Yohei SAITO, Hirohito YONEYAMA, Kazuhiro KOSEKI
  • Patent number: 8956793
    Abstract: An electrophotographic photoreceptor includes a conductive support, an undercoat layer that is provided on the conductive support and that has a thickness of from 15 ?m to 40 ?m and has light transmittance of 20% or less with respect to light having a wavelength of 450 nm when the thickness is at least 15 ?m, a charge generation layer that is provided on the undercoat layer, and a charge transport layer that is provided on the charge generation layer and that has a thickness of from 15 ?m to 40 ?m and has light transmittance of 30% or less with respect to light having a wavelength of 450 nm when the thickness is at least 15 ?m.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: February 17, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kenta Ide, Kosuke Narita, Akihiro Kawasaki, Satoya Sugiura, Akihiro Nonaka, Hirofumi Nakamura, Kazuhiro Koseki, Shigeto Hashiba
  • Patent number: 8877412
    Abstract: An image forming apparatus includes at least an electrophotographic photoreceptor having at least a conductive support, an undercoat layer, and a photosensitive layer; a charging device that charges the surface of the electrophotographic photoreceptor in a contact charging mode, in which only DC voltage is applied; an electrostatic latent image forming device that exposes the surface of the charged electrophotographic photoreceptor to form an electrostatic latent image; a developing device that develops the electrostatic latent image by a developer to form a toner image; and a transfer device that directly transfers the toner image from the electrophotographic photoreceptor to a transfer medium; and does not include an erasing device for erasing the surface of the electrophotographic photoreceptor after the toner image is transferred onto the transfer medium by the transfer device and before the surface of the electrophotographic photoreceptor is charged by the charging device.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: November 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kenta Ide, Kosuke Narita, Hirofumi Nakamura, Kazuhiro Koseki, Akihiro Kawasaki, Shigeto Hashiba, Takahiro Suzuki
  • Patent number: 8808953
    Abstract: An electrophotographic photoreceptor includes a conductive support, and an undercoat layer, a charge generation layer, and a charge transport layer that are provided in this order on the conductive support, wherein the undercoat layer includes at least metallic oxide particles, a reactive acceptor substance including an anthraquinone structure expressed by the following Formula 1, and a binder resin, the charge generation layer includes hydroxygallium phthalocyanine as a charge generation material, and a reflectance of incident light having a wavelength of 780 nm on a surface of the charge generation layer when the charge transport layer is removed is 17% or greater: wherein the anthraquinone structure expressed by Formula 1 is bonded to another structure at a position of *, and thus forms the reactive acceptor substance, and in Formula 1, n1 represents an integer of 1 to 7.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: August 19, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoya Sugiura, Shigeto Hashiba, Kazuhiro Koseki, Hirofumi Nakamura, Kenta Ide, Akihiro Nonaka, Kosuke Narita, Akihiro Kawasaki
  • Patent number: 8679709
    Abstract: According to the invention, there is provided an electrophotographic photoreceptor comprising a conductive substrate and a photosensitive layer provided on a surface of the conductive substrate, an outermost layer of the photosensitive layer containing a crosslinked product composed of a guanamine compound and at least one charge transporting material having at least one substituent selected from the group consisting of —OH, —OCH3, —NH2, —SH, and —COOH.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: March 25, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Wataru Yamada, Masahiro Iwasaki, Kazuhiro Koseki
  • Patent number: 8574797
    Abstract: An electrophotographic photoconductor includes a base, an undercoat layer that contains a metal oxide and an electron-accepting material and has a thickness of about 3 ?m or more and about 15 ?m or less, and a photosensitive layer containing a polymer having a repeating unit represented by general formula (1) where R1 and R2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, or an aryl group having 6 to 12 carbon atoms; and m and n each independently represent an integer of 0 to 4.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: November 5, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeto Hashiba, Kazuhiro Koseki, Satoya Sugiura, Kenta Ide, Fuyuki Kano
  • Publication number: 20130252147
    Abstract: An electrophotographic photoreceptor includes a conductive support, and an undercoat layer, a charge generation layer, and a charge transport layer that are provided in this order on the conductive support, wherein the undercoat layer includes at least metallic oxide particles, a reactive acceptor substance including an anthraquinone structure expressed by the following Formula 1, and a binder resin, the charge generation layer includes hydroxygallium phthalocyanine as a charge generation material, and a reflectance of incident light having a wavelength of 780 nm on a surface of the charge generation layer when the charge transport layer is removed is 17% or greater: wherein the anthraquinone structure expressed by Formula 1 is bonded to another structure at a position of *, and thus forms the reactive acceptor substance, and in Formula 1, n1 represents an integer of 1 to 7.
    Type: Application
    Filed: July 30, 2012
    Publication date: September 26, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoya SUGIURA, Shigeto HASHIBA, Kazuhiro KOSEKI, Hirofumi NAKAMURA, Kenta IDE, Akihiro NONAKA, Kosuke NARITA, Akihiro KAWASAKI
  • Publication number: 20130236821
    Abstract: An electrophotographic photoreceptor includes a conductive support, an undercoat layer that is provided on the conductive support and that has a thickness of from 15 ?m to 40 ?m and has light transmittance of 20% or less with respect to light having a wavelength of 450 nm when the thickness is at least 15 ?m, a charge generation layer that is provided on the undercoat layer, and a charge transport layer that is provided on the charge generation layer and that has a thickness of from 15 ?m to 40 ?m and has light transmittance of 30% or less with respect to light having a wavelength of 450 nm when the thickness is at least 15 ?m.
    Type: Application
    Filed: August 13, 2012
    Publication date: September 12, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kenta IDE, Kosuke NARITA, Akihiro KAWASAKI, Satoya SUGIURA, Akihiro NONAKA, Hirofumi NAKAMURA, Kazuhiro KOSEKI, Shigeto HASHIBA
  • Publication number: 20130236820
    Abstract: An image forming apparatus includes at least an electrophotographic photoreceptor having at least a conductive support, an undercoat layer, and a photosensitive layer; a charging device that charges the surface of the electrophotographic photoreceptor in a contact charging mode, in which only DC voltage is applied; an electrostatic latent image forming device that exposes the surface of the charged electrophotographic photoreceptor to form an electrostatic latent image; a developing device that develops the electrostatic latent image by a developer to form a toner image; and a transfer device that directly transfers the toner image from the electrophotographic photoreceptor to a transfer medium; and does not include an erasing device for erasing the surface of the electrophotographic photoreceptor after the toner image is transferred onto the transfer medium by the transfer device and before the surface of the electrophotographic photoreceptor is charged by the charging device.
    Type: Application
    Filed: July 20, 2012
    Publication date: September 12, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kenta IDE, Kosuke NARITA, Hirofumi NAKAMURA, Kazuhiro KOSEKI, Akihiro KAWASAKI, Shigeto HASHIBA, Takahiro SUZUKI
  • Patent number: 8492059
    Abstract: An electrophotographic photoreceptor, includes: a conductive support; and a photosensitive layer provided on or above the conductive support, the photosensitive layer including an outermost surface layer at the farthest location from the conductive support, wherein the outermost surface layer contains: coated insulating inorganic particles obtained by subjecting insulating inorganic particles having a specific surface area of not more than about 300 m2/g to a coating treatment with an aromatic functional group-containing compound; and fluorine-containing organic particles.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: July 23, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeto Hashiba, Kazuhiro Koseki, Kaori Iemura, Kenta Ide, Satoya Sugiura, Fuyuki Kano, Kazuyuki Nakamura
  • Patent number: 8426093
    Abstract: An electrophotographic photoreceptor including a photosensitive layer provided including a first functional layer including a compound represented by the following Formula (I). In Formula (I), F represents an n-valent organic group having hole transportation ability; R1, R2, and R3 each independently represents a hydrogen atom, a halogen atom, or a monovalent organic group; L represents a divalent organic group; n represents an integer of 1 to 4; and j represents an integer of 0 or 1.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: April 23, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Masahiro Iwasaki, Kazuhiro Koseki
  • Patent number: 8338926
    Abstract: A lead frame for optical semiconductor devices in which a layer 2 composed of silver or a silver alloy is formed on an electrically-conductive substrate 1, having: a surface layer 4 composed of a metal or alloy thereof excellent in corrosion resistance as an outermost layer, wherein a concentration of a metallic component excellent in corrosion resistance of the surface layer is 50% by mass or more at the uppermost portion of the surface layer, and wherein a solid-solution layer 3 of silver and a metallic material which is a main component of the surface layer is formed between the surface layer and the layer composed of silver or a silver alloy.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: December 25, 2012
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Yoshiaki Kobayashi, Kazuhiro Koseki, Shin Kikuchi