Patents by Inventor Nobuyuki Arai

Nobuyuki Arai 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: 10829633
    Abstract: An epoxy resin composition for a fiber-reinforced composite material, containing at least components [A], [B], [C], [D], and [E], wherein the epoxy resin composition when cured has a glass transition temperature greater than 220° C. and a storage modulus, as defined by a specific method, less than 35 MPa, as determined from an elastic shear modulus measured at a temperature of at least 35° C. higher than the glass transition temperature, wherein the components [A], [B], [C], [D], and [E] are: [A] at least one naphthalene-based epoxy resin having an EEW between 190 and 260 g/mol; [B] at least one epoxy resin having a functionality of three or more; [C] at least one amine curing agent; [D] at least one latent acid catalyst; and [E] at least one cycloaliphatic epoxy resin. This epoxy resin composition is useful in the molding of fiber-reinforced composite materials.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: November 10, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Benjamin Lehman, Jonathan Hughes, Swezin Than Tun, Nobuyuki Arai
  • Patent number: 10808091
    Abstract: An intermediate base material has high handleability and shape conformity to complicated shapes and serves to perform high-yield production, even by low pressure molding, of fiber reinforced plastic material that do not suffer from significant generation of molding defects, such as creases and voids, that can cause a decrease in strength and that has good mechanical characteristics, decreased variations therein, and high dimensional stability. The prepreg includes a layer containing reinforcement fibers impregnated with a resin composition and the impregnation rate with the resin composition in the prepreg is in a predetermined range. It is characterized by being an incised prepreg having a plurality of incisions, being at least partly formed of reinforcement fibers with a predetermined fiber length, and having a reinforcement fiber content by volume Vf in a predetermined range.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: October 20, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Ichiro Taketa, Yuzo Fujita, Nobuyuki Arai, Narumichi Sato
  • Publication number: 20200303400
    Abstract: According to one embodiment, a semiconductor memory device includes: a first interconnecting layer; a first signal line; a first memory cell that stores first information between the first interconnecting layer and the first signal line; second to fourth interconnecting layers provided above the first interconnecting layer; fifth to seventh interconnecting layers disposed apart from the second to fourth interconnecting layers; a second signal line coupled to the first signal line; a third signal line coupled to the first and second signal lines and the sixth interconnecting layer; and, first to fifth transistors.
    Type: Application
    Filed: July 3, 2019
    Publication date: September 24, 2020
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Fumitaka ARAI, Masakazu GOTO, Masaki KONDO, Keiji HOSOTANI, Nobuyuki MOMO
  • Publication number: 20200286828
    Abstract: According to one embodiment, a semiconductor memory device includes: a first semiconductor layer including first to third portions which are arranged along a first direction and differ in position from one another in a second direction; a conductive layer including a fourth portion extending in the second direction and a fifth portion extending in the first direction; a first insulating layer between the fourth portion and the first semiconductor layer and between the fifth portion and the first semiconductor layer; a first contact plug coupled to the fourth portion; a second contact plug coupled to the first semiconductor layer in a region where the first insulating layer is formed; a first interconnect; and a first memory cell apart from the fifth portion in the first direction and storing information between the semiconductor layer and the first interconnect.
    Type: Application
    Filed: September 9, 2019
    Publication date: September 10, 2020
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Keiji HOSOTANI, Fumitaka ARAI, Keisuke NAKATSUKA, Nobuyuki MOMO, Motohiko FUJIMATSU
  • Publication number: 20200135242
    Abstract: According to one embodiment, a semiconductor memory device includes: first to fifth interconnects; a semiconductor layer having one end located between the fourth interconnect and the fifth interconnect and other end connected to the first interconnect; a memory cell; a conductive layer having one end connected to the second interconnect and other end connected to the semiconductor layer; a first insulating layer provided to extend between the third and fourth interconnects and the semiconductor layer, and between the fifth interconnect and the conductive layer; an oxide semiconductor layer provided to extend between the fourth and fifth interconnects and the first insulating layer; and a second insulating layer provided to extend between the fourth and fifth interconnects and the oxide semiconductor layer.
    Type: Application
    Filed: July 3, 2019
    Publication date: April 30, 2020
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Fumitaka ARAI, Keiji HOSOTANI, Nobuyuki MOMO
  • Patent number: 10611057
    Abstract: A process is capable of producing a high-quality fiber-reinforced plastic with good yield in a short molding cycle time despite being atmospheric pressure molding. The process characterized uses local contact heating to give different temperature conditions to produce a fiber-reinforced plastic by atmospheric pressure molding from a fiber-reinforced material which contains a reinforcing fiber impregnated with a thermosetting resin composition.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: April 7, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Ichiro Taketa, Hiroaki Matsutani, Nobuyuki Arai, Narumichi Sato
  • Publication number: 20200048453
    Abstract: An epoxy resin composition for a fiber-reinforced composite material, containing at least components [A], [B], [C], [D], and [E], wherein the epoxy resin composition when cured has a glass transition temperature greater than 220° C. and a storage modulus, as defined by a specific method, less than 35 MPa, as determined from an elastic shear modulus measured at a temperature of at least 35° C. higher than the glass transition temperature, wherein the components [A], [B], [C], [D], and [E] are: [A] at least one naphthalene-based epoxy resin having an EEW between 190 and 260 g/mol; [B] at least one epoxy resin having a functionality of three or more; [C] at least one amine curing agent; [D] at least one latent acid catalyst; and [E] at least one cycloaliphatic epoxy resin. This epoxy resin composition is useful in the molding of fiber-reinforced composite materials.
    Type: Application
    Filed: October 19, 2017
    Publication date: February 13, 2020
    Applicant: Toray Industries, Inc.
    Inventors: Benjamin Lehman, Jonathan Hughes, Swezin Than Tun, Nobuyuki Arai
  • Publication number: 20190359785
    Abstract: A prepreg includes; sizing agent-coated carbon fibers coated with a sizing agent; and a thermosetting resin composition impregnated into the sizing agent-coated carbon fibers. The sizing agent includes an aliphatic epoxy compound (A) and an aromatic compound (B) at least containing an aromatic epoxy compound (B1). The thermosetting resin composition includes a thermosetting resin (D) and a latent hardener (E), and optionally includes an additive (F) other than the thermosetting resin (D) and the latent hardener (E). The (a)/(b) ratio is within a predetermined range where (a) is the height of a component at a binding energy assigned to CHx, C—C, and C?C and (b) is the height of a component at a binding energy assigned to C—) in a C1s core spectrum of the surfaces of the sizing agent-coated carbon fibers analyzed by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Nobuyuki ARAI, Tomoko ICHIKAWA, Hiroshi TAIKO, Makoto ENDO, Masanobu KOBAYASHI, Jun MISUMI
  • Patent number: 10409192
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: September 10, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomoya Fujii, Tadashi Nakamura, Nobuyuki Arai, Yoshinobu Sakaue, Noboru Kusunose, Daisuke Imaki
  • Patent number: 10400076
    Abstract: An epoxy resin composition including [A1] a hardener represented by Formula (1), and [B] an aromatic epoxy resin having tri- or higher functionality, wherein a carbon nuclear relaxation time T1C corresponding to a benzene ring carbon atom in the main backbone of Formula (1) assigned to 130 ppm in a solid-state 13C-NMR spectrum is 42 seconds or longer, and a prepreg and a carbon fiber-reinforced composite material obtained using the epoxy resin composition: wherein X represents any one selected from —CH2—, —O—, —CO—, —C(?O)O—, —S—, —SO2—, and —NHC(?O)—; n represents 1 to 5; and R1 to R6 each represent at least one selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group having 1 to 4 carbon atoms, an alicyclic hydrocarbon group having 4 or less carbon atoms, and an a halogen atom, wherein when X is —C(?O)O— or —NHC(?O)—, X may be in either direction.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: September 3, 2019
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Shizue Ueno, Nobuyuki Arai, Jun Misumi, Hiroshi Taiko
  • Publication number: 20190219801
    Abstract: There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
    Type: Application
    Filed: March 21, 2019
    Publication date: July 18, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei TAKANO, Hibiki TATSUNO, Nobuyuki ARAI, Hirotoshi NAKAYAMA
  • Publication number: 20190169356
    Abstract: The embodiments herein relate to an epoxy resin composition containing a specific type of amine-based epoxy resin containing four epoxy groups per molecule, a prepreg, and a fiber-reinforced composite material. More specifically, the embodiments herein relate to an epoxy resin composition containing a combination of particular types of epoxy resin and curatives that provides high flexural modulus that is suitable for preparing a fiber-reinforced composite material capable of withstanding extreme use environments such as low-temperature environments and high-temperature moisture-absorbing environments. In addition, the embodiments herein relate to epoxy resin systems capable of achieving a high degree of cure (e.g., 85% or more) within a relatively short period of time (e.g., less than two hours) at a relatively low temperature (e.g., 132° C.).
    Type: Application
    Filed: August 24, 2017
    Publication date: June 6, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Swezin Than Tun, Jonathan Hughes, Nobuyuki Arai, Benjamin Lehman
  • Patent number: 10241308
    Abstract: There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: March 26, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hibiki Tatsuno, Nobuyuki Arai, Hirotoshi Nakayama
  • Publication number: 20180355132
    Abstract: A permeable laminate body containing at least one partially impregnated prepreg which includes at least component (A) containing a matrix of reinforcing fiber, component (B) containing a thermosetting resin, and, optionally, component (C) containing a particle or a fiber of a thermoplastic resin exhibits long out time processability with good storage stability, achieving when molded and cured a fiber reinforced composite having a low void ratio and providing excellent mechanical performance.
    Type: Application
    Filed: December 14, 2016
    Publication date: December 13, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Alfred P. Haro, Nobuyuki Arai
  • Patent number: 10138593
    Abstract: Sizing agent-coated carbon fibers includes: a sizing agent including an aliphatic epoxy compound (A) and at least containing an aromatic epoxy compound (B1) as an aromatic compound (B); and carbon fibers coated with the sizing agent, wherein the sizing agent-coated carbon fibers have an (a)/(b) ratio of 0.50 to 0.90 where (a) is a height (cps) of a component at a binding energy (284.6 eV) assigned to CHx, C—C, and C?C and (b) is a height (cps) of a component at a binding energy (286.1 eV) assigned to C—O in a C1s core spectrum of a surface of the sizing agent applied onto the carbon fibers analyzed by X-ray photoelectron spectroscopy using AlK?1,2 as an X-ray source at a photoelectron takeoff angle of 15°.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: November 27, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Tomoko Ichikawa, Makoto Endo, Hiroshi Taiko, Masanobu Kobayashi, Nobuyuki Arai, Jun Misumi
  • Patent number: 9963586
    Abstract: Embodiments herein relate to a prepreg comprising a thermosetting resin, and reinforcing fibers in the thermosetting resin, wherein when the prepreg is cured in vacuum bag only conditions, and a method of making the same. The method also applies for autoclave processing. Embodiments also relate to a cured fiber reinforced composite material made by thermally curing the prepreg.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: May 8, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Jonathan C Hughes, Jeffrey A Satterwhite, Nobuyuki Arai, Atsuhito Arai, Alfred P Haro, Kenichi Yoshioka
  • Patent number: 9957387
    Abstract: An epoxy resin composition having components (A), (B), (C), and (D), wherein the epoxy resin composition has a viscosity at 40° C. of about 1×103 to about 1×104 Pa·s, a curing start temperature of about 90 to about 110° C., and a minimum viscosity at the curing start temperature of about 2 to about 20 Pa·s, wherein the components (A), (B), (C), and (D) are as follows: (A) About 60 weight parts or more of a tetraglycidyl amine type epoxy resin per 100 weight parts of the epoxy resin blend; (B) Dicyandiamide; (C) Diaminodiphenyl sulfone and (D) Urea compound.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: May 1, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Nobuyuki Arai, Alfred P. Haro, Jonathan C. Hughes, Norimitsu Natsume
  • Patent number: 9935420
    Abstract: A laser device is provided including a surface emitting laser array configured to emit light, an optical system disposed in an optical path of light that is emitted from the surface emitting laser, a laser resonator which the light passed through the optical system enters, where the optical system includes a first optical element configured to collimate the light emitted from the surface emitting laser, and a second optical element configured to collect and condense the light collimated by the first optical element.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: April 3, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuma Izumiya, Tsuyoshi Suzudo, Naoto Jikutani, Yasuhiro Higashi, Kentaroh Hagita, Masayuki Numata, Nobuyuki Arai
  • Publication number: 20180088485
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Application
    Filed: November 7, 2017
    Publication date: March 29, 2018
    Inventors: TOMOYA FUJII, Tadashi NAKAMURA, Nobuyuki ARAI, Yoshinobu SAKAUE, Noboru KUSUNOSE, Daisuke IMAKI
  • Patent number: 9864296
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 9, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomoya Fujii, Tadashi Nakamura, Nobuyuki Arai, Yoshinobu Sakaue, Noboru Kusunose, Daisuke Imaki