Patents by Inventor Akihiro Maruyama

Akihiro Maruyama 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: 10676587
    Abstract: A heat conductive sheet comprising a cured product layer of a heat conductive silicone composition on one or both surfaces of a glass cloth sealed using a cured product of a heat conductive resin composition. The heat conductive silicone composition includes an organic silicon compound component and an aspherical heat conductive filler. The amount of the heat conductive filler is 250 to 600 parts by mass with respect to 100 parts by mass of the organic silicon compound component, and the heat conductive filler has a DOP oil absorption of not more than 80 ml/100 g. The heat conductive sheet can be continuously manufactured by coating molding and wound into a roll even with the use of an inexpensive aspherical heat conductive filler, and has high heat conductivity, low thermal contact resistance, and high insulating properties.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: June 9, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akihiro Endo, Yasuhisa Ishihara, Toru Tsuchiya, Hisaharu Yamaguchi, Masahiro Moteki, Takahiro Maruyama
  • Patent number: 10656542
    Abstract: An electrophotographic photosensitive member includes an undercoat layer, a charge generation layer, and a charge transport layer in this order. The undercoat layer contains a cured product of a composition containing an electron transport material, a particle having an average primary particle size of 10 nm or more, and a silicone oil. A content of the particle in the undercoat layer is 3% by mass or more and 20% by mass or less. A content of the silicone oil in the undercoat layer is 0.01% by mass or more and 10% by mass or less relative to the content of the particle.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: May 19, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Nishi, Kunihiko Sekido, Yuka Ishiduka, Akihiro Maruyama
  • Patent number: 10637569
    Abstract: A method estimating transmission characteristics of an optical transmitter of a transmission unit and an optical receiver of a reception unit, including: estimating a temporary transfer or inverse transfer function of the optical receiver; estimating a transfer or inverse transfer function of the optical transmitter from first data acquired by the reception unit when a first known signal is transmitted from the transmission unit, and the estimated temporary transfer or inverse transfer function of the optical receiver, a difference between the first known signal and an original first known signal is minimized; and estimating a transfer or inverse transfer function of the optical receiver from second data acquired by the reception unit when a second known signal is transmitted from the transmission unit, and the estimated transfer or inverse transfer function of the optical transmitter, a difference between the second known signal and an original second known signal is minimized.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: April 28, 2020
    Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akihiro Yamagishi, Tetsuya Maruyama, Masanori Nakamura, Asuka Matsushita, Shogo Yamanaka
  • Publication number: 20200036440
    Abstract: A method estimating transmission characteristics of an optical transmitter of a transmission unit and an optical receiver of a reception unit, including: estimating a temporary transfer or inverse transfer function of the optical receiver; estimating a transfer or inverse transfer function of the optical transmitter from first data acquired by the reception unit when a first known signal is transmitted from the transmission unit, and the estimated temporary transfer or inverse transfer function of the optical receiver, a difference between the first known signal and an original first known signal is minimized; and estimating a transfer or inverse transfer function of the optical receiver from second data acquired by the reception unit when a second known signal is transmitted from the transmission unit, and the estimated transfer or inverse transfer function of the optical transmitter, a difference between the second known signal and an original second known signal is minimized.
    Type: Application
    Filed: November 8, 2017
    Publication date: January 30, 2020
    Applicants: NTT Electronics Corporation, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akihiro YAMAGISHI, Tetsuya MARUYAMA, Masanori NAKAMURA, Asuka MATSUSHITA, Shogo YAMANAKA
  • Publication number: 20190382523
    Abstract: The present invention relates to a polyol for a crosslinkable polyurethane resin composition, containing a high molecular polyol represented by the following formula (1) or (2), in which the high molecular polyol is a condensate of a polyfunctional carboxylic acid (A) with a bifunctional polyether polyol (B), the high molecular polyol has a number average molecular weight (Mn) in a range of 1,000 to 10,000, and the polyol for a crosslinkable polyurethane resin composition has a content of the high molecular polyol of 0.1 wt % to 15 wt %.
    Type: Application
    Filed: June 13, 2019
    Publication date: December 19, 2019
    Applicant: HODOGAYA CHEMICAL CO., LTD.
    Inventors: Akihiro MATSUMOTO, Yuo MARUYAMA
  • Publication number: 20190376185
    Abstract: A plasma processing apparatus includes: a shower head including a ceiling plate having a plurality of gas holes, and a base member having a space so as to supply the processing gas to the plurality of gas holes; a temperature adjustment mechanism provided in the shower head; an acquisition unit configured to acquire a combination of a plasma parameter and pressure in the space in the base member; an estimation unit configured to estimate temperature of the ceiling plate corresponding to the acquired combination of the parameter and the pressure with reference to temperature information indicating the temperature of the ceiling plate corresponding to the combination of the parameter and the pressure; and a temperature controller configured to control the temperature adjustment mechanism such that the estimated temperature of the ceiling plate becomes target temperature when a plasma processing is performed.
    Type: Application
    Filed: June 5, 2019
    Publication date: December 12, 2019
    Inventors: Akihiro Yokota, Kazuki Moyama, Koji Maruyama
  • Publication number: 20190310561
    Abstract: An electrophotographic photosensitive member includes an undercoat layer, a charge generation layer, and a charge transport layer in this order. The undercoat layer contains a cured product of a composition containing an electron transport material, a particle having an average primary particle size of 10 nm or more, and a silicone oil. A content of the particle in the undercoat layer is 3% by mass or more and 20% by mass or less. A content of the silicone oil in the undercoat layer is 0.01% by mass or more and 10% by mass or less relative to the content of the particle.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 10, 2019
    Inventors: Masashi Nishi, Kunihiko Sekido, Yuka Ishiduka, Akihiro Maruyama
  • Patent number: 10439126
    Abstract: A piezoelectric actuator includes a piezoelectric element, a connection member of a shaft or weight connected to an element end surface of the piezoelectric element, the other one of the shaft and weight connected to a first end surface constituting an end surface opposing to the element end surface of the piezoelectric element, a wiring portion, and a resin portion. The piezoelectric element forms external electrodes on surfaces thereof, alternately laminates internal electrode layers with piezoelectric layers therebetween, and provides part of the external electrodes on the element end surface. The wiring portion has conductive portions corresponding to the external electrodes. The resin portion fixes the piezoelectric element, the connection member, and the wiring portion so that the element end surface opposes to the connection member with the wiring portion therebetween and that the conductive portions are electrically connected to the external electrodes.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: October 8, 2019
    Assignee: TDK CORPORATION
    Inventors: Satoshi Ozawa, Koji Taniwaki, Toshiki Maruyama, Akihiro Takeda
  • Patent number: 10370575
    Abstract: A thermally conductive sheet including a glass cloth filled with a thermally conductive resin composition, one or both surfaces of the glass cloth being layered with a cured, thermally conductive silicone composition, wherein the thermally conductive silicone composition comprises a silicone component and thermally conductive filler (C) of an amount of 1,200 to 2,000 parts by mass, relative to 100 parts by mass of the silicone component, the thermally conductive filler (C) has an average particle size smaller than 15 ?m, and an amount of particles having a particle size of 45 ?m or larger is 0 to 3 mass % and an amount of particles having a particle size of 75 ?m or larger is 0 to 0.01 mass %, based on an amount of the thermally conductive filler (C).
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: August 6, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yasuhisa Ishihara, Akihiro Endo, Takahiro Maruyama
  • Publication number: 20190233612
    Abstract: A heat conductive sheet comprising a cured product layer of a heat conductive silicone composition on one or both surfaces of a glass cloth sealed using a cured product of a heat conductive resin composition. The heat conductive silicone composition includes an organic silicon compound component and an aspherical heat conductive filler. The amount of the heat conductive filler is 250 to 600 parts by mass with respect to 100 parts by mass of the organic silicon compound component, and the heat conductive filler has a DOP oil absorption of not more than 80 ml/100 g. The heat conductive sheet can be continuously manufactured by coating molding and wound into a roll even with the use of an inexpensive aspherical heat conductive filler, and has high heat conductivity, low thermal contact resistance, and high insulating properties.
    Type: Application
    Filed: June 9, 2017
    Publication date: August 1, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akihiro ENDO, Yasuhisa ISHIHARA, Toru TSUCHIYA, Hisaharu YAMAGUCHI, Masahiro MOTEKI, Takahiro MARUYAMA
  • Patent number: 10363742
    Abstract: A liquid ejecting apparatus includes a liquid ejecting head which ejects liquid from nozzles; a liquid supply path which includes a liquid chamber partly formed of a flexible member, and supplies liquid to the liquid ejecting head; and a flow path unit which includes a displacement detecting unit which detects a displacement of the flexible member, and the liquid chamber, in which the flexible member closes the liquid supply path by being displaced in a direction in which a volume of the liquid chamber is reduced due to a decrease in liquid in the liquid chamber.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: July 30, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Akihiko Maruyama, Akihiro Toya
  • Patent number: 10164384
    Abstract: A coaxial connector mounted to a board, wherein a center conductor is provided with a contact portion in contact with the terminal of a counterpart connector. A first coupling portion couples to the contact portion and extends in the axial direction of an outer conductor. A bend portion couples to the first coupling portion and is bent in the radial direction of the outer conductor. A second coupling portion couples to the bend portion and extends in the radial direction of the outer conductor. A connecting portion couples to the second coupling portion and connects said center conductor to on-board circuitry. A first and second expanded portion produced by an expansion of a portion of the outer peripheral surface of said first and second coupling portions, is formed in the first and second coupling portions.
    Type: Grant
    Filed: July 23, 2017
    Date of Patent: December 25, 2018
    Assignee: HIROSE ELECTRIC CO., LTD.
    Inventors: Akihiro Maruyama, Takashi Sawai
  • Patent number: 10114301
    Abstract: An electrophotographic photoreceptor abuts against a charging member and/or a developer carrying member with an abutting member therebetween, has a first portion and a second portion abutting against the abutting member along the longitudinal direction of the photoreceptor, and includes a support, a charge generating layer containing a charge generation material, and a surface layer in this order. The first portion includes an undercoat layer containing a polymer of a composition containing an electron transport material and a crosslinking agent and being contiguous with the surface of the charge generating layer facing the support. The second portion includes (i) an intermediate layer being disposed between and being contiguous with the support and the charge generating layer and/or (ii) an intermediate layer being disposed between and being contiguous with the charge generating layer and the surface layer, wherein the intermediate layers each have a Martens hardness of 500 N/mm2 or less.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: October 30, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Yuka Ishiduka, Atsushi Fujii, Akihiro Maruyama, Kazunori Noguchi, Nobuhiro Nakamura, Yuki Yamamoto, Kazuko Araki, Tatsuya Ikezue
  • Publication number: 20180048101
    Abstract: A coaxial connector mounted to a board, wherein a center conductor is provided with a contact portion in contact with the terminal of a counterpart connector. A first coupling portion couples to the contact portion and extends in the axial direction of an outer conductor. A bend portion couples to the first coupling portion and is bent in the radial direction of the outer conductor. A second coupling portion couples to the bend portion and extends in the radial direction of the outer conductor. A connecting portion couples to the second coupling portion and connects said center conductor to on-board circuitry. A first and second expanded portion produced by an expansion of a portion of the outer peripheral surface of said first and second coupling portions, is formed in the first and second coupling portions.
    Type: Application
    Filed: July 23, 2017
    Publication date: February 15, 2018
    Inventors: Akihiro MARUYAMA, Takashi SAWAI
  • Patent number: 9864284
    Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: January 9, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Kawahara, Hirotoshi Uesugi, Akihiro Maruyama, Hirofumi Kumoi, Masato Tanaka, Hiroyuki Tomono, Shoma Hinata, Yota Ito, Daisuke Miura, Takashi Anezaki, Tatsuya Yamaai, Kazumichi Sugiyama
  • Patent number: 9817326
    Abstract: A support, a conductive layer, and an intermediate layer of an electrophotographic photosensitive member have a particular surface profile. The intermediate layer is a cured film containing particles.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: November 14, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuki Yamamoto, Atsushi Fujii, Atsushi Okuda, Yuka Ishiduka, Kazunori Noguchi, Akihiro Maruyama, Nobuhiro Nakamura, Kazuko Sakuma
  • Patent number: 9811008
    Abstract: An image forming method in which a surface layer of an electrophotographic photosensitive member contains a compound having a specific structure in an amount of 0.1% to 10% by mass based on the total mass of the surface layer, and in a charged region of the surface of the electrophotographic photosensitive member charged in a charging step, a non-image forming region in which an electrostatic latent image is not formed is not irradiated with destaticizing light or is irradiated with reduced destaticizing light.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: November 7, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Yuka Ishiduka, Yuki Yamamoto, Atsushi Okuda, Akihiro Maruyama, Atsushi Fujii, Nobuhiro Nakamura, Kazuko Sakuma
  • Patent number: 9753385
    Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure).
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: September 5, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yota Ito, Daisuke Miura, Shoma Hinata, Hiroyuki Tomono, Takashi Anezaki, Tatsuya Yamaai, Kazumichi Sugiyama, Masataka Kawahara, Hirotoshi Uesugi, Akihiro Maruyama, Hirofumi Kumoi, Masato Tanaka
  • Patent number: 9726992
    Abstract: An electrophotographic photosensitive member comprises a support, an undercoat layer, a charge generation layer and a hole transporting layer disposed in this order. The undercoat layer contains silica particles and a polymer of a composition including an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent. The content of the electron transporting material in the composition is 30 to 70 mass % relative to the total mass of the composition and the content of the silica particles in the undercoat layer is 1 to 30 mass % relative to the total mass of the electron transporting material.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: August 8, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuko Sakuma, Yuka Ishiduka, Atsushi Okuda, Kazunori Noguchi, Yuki Yamamoto, Atsushi Fujii, Akihiro Maruyama, Nobuhiro Nakamura
  • Patent number: 9651879
    Abstract: A charge-transporting layer as the surface layer of an electrophotographic photosensitive member contains a charge-transporting substance, and contains, as resins, a resin A having specific structural units and a polycarbonate resin D having specific structural units. The charge-transporting layer has, in a matrix containing the charge-transporting substance and the polycarbonate resin D, domains each containing the resin A.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: May 16, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto