Patents by Inventor Yutaka Oka

Yutaka Oka 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: 11939472
    Abstract: A Curable Silicone Composition, Encapsulant And Optical Semiconductor Device provides a curable silicone composition having excellent storage stability at room temperature. A curable silicone composition having (A) a resinous alkenyl group-containing organopolysiloxane including at least two alkenyl groups per molecule and at least one siloxane unit represented by SiO4/2; (B) an organohydrogenpolysiloxane having at least two silicon atom-bonded hydrogen atoms in one molecule; (C) an alkyne group-containing compound; and (D) a curing catalyst, wherein the content of the resinous alkenyl group-containing organopolysiloxane (A) is 20 mass % or more based on the total mass of the organopolysiloxane components.
    Type: Grant
    Filed: May 16, 2022
    Date of Patent: March 26, 2024
    Assignee: Dupont Toray Specialty Materials Kabushiki Kaisha
    Inventor: Yutaka Oka
  • Publication number: 20230348721
    Abstract: A UV curable silicone composition has exceptional curability by ultraviolet irradiation.
    Type: Application
    Filed: July 10, 2023
    Publication date: November 2, 2023
    Inventors: Shunya Takeuchi, Anna Ya Ching Feng, Yutaka Oka, Jung Hye Chae
  • Patent number: 11781016
    Abstract: A UV curable silicone composition has exceptional curability by ultraviolet irradiation.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: October 10, 2023
    Assignees: DuPont Toray Specialty Materials Kabushiki Kaisha, Rohm and Haas Electronic Materials LLC, Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Shunya Takeuchi, Anna Ya Ching Feng, Yutaka Oka, Jung Hye Chae
  • Publication number: 20220372291
    Abstract: A Curable Silicone Composition, Encapsulant And Optical Semiconductor Device provides a curable silicone composition having excellent storage stability at room temperature. A curable silicone composition having (A) a resinous alkenyl group-containing organopolysiloxane including at least two alkenyl groups per molecule and at least one siloxane unit represented by SiO4/2; (B) an organohydrogenpolysiloxane having at least two silicon atom-bonded hydrogen atoms in one molecule; (C) an alkyne group-containing compound; and (D) a curing catalyst, wherein the content of the resinous alkenyl group-containing organopolysiloxane (A) is 20 mass % or more based on the total mass of the organopolysiloxane components.
    Type: Application
    Filed: May 16, 2022
    Publication date: November 24, 2022
    Inventor: Yutaka OKA
  • Publication number: 20220064445
    Abstract: A thermosetting silicone composition provides excellent adhesiveness and durability even when cured in a short period of time. The thermosetting silicone composition comprises (A) a polyorganosiloxane having at least two alkenyl groups at both ends of the molecular chain, (B) a resinous organopolysiloxane having at least two alkenyl groups at the end of the molecular chain, (C) a polyorganosiloxane having at least two silicon atom-bonded hydrogen atoms at the side chain of the molecular chain, and (D) a curing reaction catalyst.
    Type: Application
    Filed: July 29, 2021
    Publication date: March 3, 2022
    Inventor: Yutaka Oka
  • Publication number: 20210269642
    Abstract: A UV curable silicone composition has exceptional curability by ultraviolet irradiation.
    Type: Application
    Filed: February 12, 2021
    Publication date: September 2, 2021
    Inventors: Shunya Takeuchi, Anna Ya Ching Feng, Yutaka Oka, Jung Hye Chae
  • Patent number: 11091636
    Abstract: Disclosed is a liquid silicone composition for transfer- or injection-molding optical parts. The liquid silicone composition comprises: (A) a linear organopolysiloxane having in a molecule at least two silicon-bonded C2-10 alkenyl groups and at least one silicon-bonded C6-20 aryl group; (B) an organopolysiloxane resin represented by a specific average unit formula; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a hydrosilylation reaction catalyst; and (E) a hydrosilylation reaction inhibitor.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: August 17, 2021
    Assignees: DOW SILICONES CORPORATION, DOW TORAY CO., LTD.
    Inventors: Jong-Chan Park, Min-Hee Kwon, Yutaka Oka
  • Publication number: 20200392334
    Abstract: Disclosed is a liquid silicone composition for transfer- or injection-molding optical parts. The liquid silicone composition comprises: (A) a linear organopolysiloxane having in a molecule at least two silicon-bonded C2-10 alkenyl groups and at least one silicon-bonded C6-20 aryl group; (B) an organopolysiloxane resin represented by a specific average unit formula; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a hydrosilylation reaction catalyst; and (E) a hydrosilylation reaction inhibitor.
    Type: Application
    Filed: June 19, 2018
    Publication date: December 17, 2020
    Inventors: Jong-Chan PARK, Min-Hee KWON, Yutaka OKA
  • Patent number: 10333038
    Abstract: In an LED module, modes to solve such a problem that a loss in the output of light discharged into the atmosphere occurs are embodied. Specifically, in an LED module in which an LED chip is sealed with a sealing resin, a surface of the sealing resin is covered with a thin film, the thin film is made of a material having a smaller linear expansion coefficient than the sealing resin, and an irregular surface is provided on a surface of the thin film such that light from the LED chip is multiply reflected.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: June 25, 2019
    Assignee: TORAY ENGINEERING CO., LTD.
    Inventors: Takayoshi Fujimoto, Masamichi Yamashita, Masaki Mori, Yutaka Oka
  • Publication number: 20180108821
    Abstract: In an LED module, modes to solve such a problem that a loss in the output of light discharged into the atmosphere occurs are embodied. Specifically, in an LED module in which an LED chip is sealed with a sealing resin, a surface of the sealing resin is covered with a thin film, the thin film is made of a material having a smaller linear expansion coefficient than the sealing resin, and an irregular surface is provided on a surface of the thin film such that light from the LED chip is multiply reflected.
    Type: Application
    Filed: March 23, 2016
    Publication date: April 19, 2018
    Inventors: Takayoshi FUJIMOTO, Masamichi YAMASHITA, Masaki MORI, Yutaka OKA
  • Patent number: 9683084
    Abstract: The present invention relates to a curable silicone composition comprising: (A) an organopolysiloxane represented by a specific average unit formula and having at least two alkenyl groups in a molecule, (B) an optional straight-chain organopolysiloxane having at least two alkenyl groups and not having any silicon-bonded hydrogen atoms in a molecule, (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule, wherein at least 80 mass % of this component comprises an organotrisiloxane represented by the formula: H(CH3)2SiO(C6H5)2SiOSi(CH3)2H, and (D) a hydrosilylation reaction catalyst. The curable silicone composition has excellent handleability and high reactivity and forms a cured product with low gas permeability.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: June 20, 2017
    Assignee: DOW CORNING TORAY CO., LTD.
    Inventors: Akihiko Kobayashi, Yutaka Oka, Michitaka Suto, Tomohiro Iimura
  • Publication number: 20150284514
    Abstract: The present invention relates to a curable silicone composition comprising: (A) an organopolysiloxane represented by a specific average unit formula and having at least two alkenyl groups in a molecule, (B) an optional straight-chain organopolysiloxane having at least two alkenyl groups and not having any silicon-bonded hydrogen atoms in a molecule, (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule, wherein at least 80 mass % of this component comprises an organotrisiloxane represented by the formula: H(CH3)2SiO(C6H5)2SiOSi(CH3)2H, and (D) a hydrosilylation reaction catalyst. The curable silicone composition has excellent handleability and high reactivity and forms a cured product with low gas permeability.
    Type: Application
    Filed: October 23, 2013
    Publication date: October 8, 2015
    Inventors: Akihiko Kobayashi, Yutaka Oka, Michitaka Suto, Tomohiro Iimura
  • Publication number: 20100327919
    Abstract: A differential amplifier main circuit amplifies, while first voltage is applied to drains of first and second transistors via a load circuit and second voltage is applied to source of third transistor, a difference between voltages applied to gates of the first and second transistors, and outputs it from a connection between the load circuit and drains of the first or second transistor. A voltage application circuit applies voltage to the gate of the third transistor so that a current between the source and drain thereof to have a predetermined magnitude. Gates of transistors of the application circuit are connected to a second common-connection of drains thereof to which the first voltage is applied via a load, the second voltage is applied to a first common-connection of sources of the transistors, and a connection of the second common-connection and the load is connected to the gate of the third transistor.
    Type: Application
    Filed: June 25, 2010
    Publication date: December 30, 2010
    Applicant: OKI SEMICONDUCTOR CO., LTD.
    Inventor: Yutaka Oka
  • Patent number: 7782696
    Abstract: The semiconductor storage device according to the present invention comprises a switch provided to a bit line between a memory cells and a sense amplifier and capable of continuously varying a degree of conduction; and a switch control circuit for varying the degree of conduction of the switch in accordance with an access request signal. The semiconductor storage device of the present invention enables operation in which the degree of conduction between the sense amplifier and a memory cell is increased, and an ON state is achieved during a time in which the sense amplifier amplifies the holding voltage of the memory cell and feeds the amplified holding voltage to the bit line. The access time can thereby be reduced.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: August 24, 2010
    Assignee: Oki Semiconductor Co., Ltd.
    Inventor: Yutaka Oka
  • Publication number: 20090027985
    Abstract: The semiconductor storage device according to the present invention comprises a switch provided to a bit line between a memory cells and a sense amplifier and capable of continuously varying a degree of conduction; and a switch control circuit for varying the degree of conduction of the switch in accordance with an access request signal. The semiconductor storage device of the present invention enables operation in which the degree of conduction between the sense amplifier and a memory cell is increased, and an ON state is achieved during a time in which the sense amplifier amplifies the holding voltage of the memory cell and feeds the amplified holding voltage to the bit line. The access time can thereby be reduced.
    Type: Application
    Filed: June 11, 2008
    Publication date: January 29, 2009
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventor: Yutaka OKA
  • Patent number: 7462444
    Abstract: An image forming method comprising: imagewise exposing and thermal developing a photothermographic material using an image recording apparatus, wherein a part of the sheet is exposed and, in parallel with the exposure, development is started on a part of the sheet having been already exposed: wherein the photothermographic material comprises a reducing agent represented by formula (R), and wherein the photosensitive silver halide contains at least two preformed photosensitive silver halides having respective sensitivities different from each other for a light with the same exposure wavelength and a silver iodide content of the photosensitive silver halide is 40% by mole or more.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: December 9, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Yutaka Oka, Tomoyuki Ohzeki
  • Patent number: 7235352
    Abstract: The present invention provides a photothermographic material including a support having disposed on one surface thereof at least one image-forming layer containing a binder, an organic silver salt, a reducing agent for reducing silver ions, an organic polyhalogen compound and a photosensitive silver halide, wherein the photosensitive silver halide has a silver iodide content ranging from 10 mol % to 100 mol %. The silver halide further contains at least one metal selected from a first metal group and one metal selected from a second metal group, with a proviso that none of the at least one metal selected from the first metal group and the at least one metal selected from the second metal group are the same.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: June 26, 2007
    Assignee: Fujifilm Corporation
    Inventors: Yutaka Oka, Seiichi Yamamoto
  • Publication number: 20070117054
    Abstract: The present invention provides a photothermographic material including a support having disposed on one surface thereof at least one image-forming layer containing a binder, an organic silver salt, a reducing agent for reducing silver ions, an organic polyhalogen compound and a photosensitive silver halide, wherein the photosensitive silver halide has a silver iodide content ranging from 10 mol % to 100 mol %. The silver halide further contains at least one metal selected from a first metal group and one metal selected from a second metal group, with a proviso that none of the at least one metal selected from the first metal group and the at least one metal selected from the second metal group are the same.
    Type: Application
    Filed: January 17, 2007
    Publication date: May 24, 2007
    Inventors: Yutaka Oka, Seiichi Yamamoto
  • Patent number: 7175721
    Abstract: The invention relates to a method for producing high-performance Cr—Ti—V hydrogen storage alloys utilizing a thermit process, whereby residence of adversely affecting impurities is inhibited, addition of not less than 10 at % of Ti as an alloy component is realized, and thermal burden on the crucible used in the method is reduced. The method includes the steps of: (A) providing an alloy material (1) comprising a Cr oxide, a V oxide, and a reducing agent Al, and an alloy material (2) comprising Ti; (B) placing the alloy materials in a crucible for thermit reduction so that the alloy material (1) is placed above the alloy material (2); (C) igniting the alloy material (1) placed in step (B) and melting all metal elements contained in the alloy materials the with heat of the thermit reaction of the alloy material (1); and (D) making the alloy melt obtained in step (C) into an alloy.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: February 13, 2007
    Assignee: Santoku Corporation
    Inventors: Hiroaki Takata, Yutaka Oka, Junichi Nakagawa, Akira Neoda
  • Patent number: 7105282
    Abstract: An image forming method using a photothermographic material a photosensitive silver halide, a reducing agent, a binder and a non-photosensitive organic silver salt, wherein: the photothermographic material is discharged from a thermal developing device within 35 seconds after heating for thermal development is ceased.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: September 12, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsutoshi Yamane, Sumito Yamada, Eiichi Okutsu, Tomoyuki Ohzeki, Yutaka Oka