Patents by Inventor Yoshitaka Takezawa

Yoshitaka Takezawa 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: 20240092627
    Abstract: To provide a safety joint housing device for preventing a plug of a safety joint or a filling hose from being locked in a lower opening of a casing when the safety joint separates, thereby preventing a filling device from falling over and being damaged. A safety joint housing device 100 according to the present invention houses a safety joint 101 including a plug 10 connected to a filling hose 61 and a socket 20 provided in a filling device 200, the plug 10 and the socket 20 separating from each other when a tensile load exceeding a predetermined level is applied, the safety joint housing device 100 including: a casing 320; a substrate 80 attached to the casing 320 on a main body side of the filling device 200; and a member 30 that is provided at a lower opening 320A of the casing 320 and deforms when in contact with the plug 10 or the filling hose 61.
    Type: Application
    Filed: September 11, 2023
    Publication date: March 21, 2024
    Inventors: Masahiro TAKEZAWA, Yoshitaka TSUGUMI, Yoshimi OTO, Toshihiko OUCHI
  • Publication number: 20240077166
    Abstract: To provide a filling hose guide device for preventing a plug of a safety joint or a filling hose from being locked in a lower opening of a casing when a safety joint separates, thereby preventing a filling device from falling over and being damaged. A filling hose guide device 100 according to the present invention is characterized in that after a plug 10 connected to a filling hose 61 and a socket 20 provided in a filling device 200 in a safety joint 300 separate when a tensile load above a predetermined level is applied to the filling hose 61, the filling hose guide devices 100 include: a rotatable or deformable member 30A, 30B, with which the filling hose 61 contacts, below the safety joint 300; and a support structure 50, through which the filling hose 61 passes, for supporting the rotatable or deformable member 30A, 30B.
    Type: Application
    Filed: August 23, 2023
    Publication date: March 7, 2024
    Inventors: Masahiro TAKEZAWA, Yoshitaka TSUGUMI, Yoshimi OTO, Toshihiko OUCHI
  • Patent number: 11919995
    Abstract: An epoxy resin, comprising an epoxy compound having two or more mesogenic structures, and having a loss tangent of 1 or more at 35° C. before curing.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: March 5, 2024
    Assignee: RESONAC CORPORATION
    Inventors: Naoki Maruyama, Tomoko Higashiuchi, Kazumasa Fukuda, Hideyuki Katagi, Yuki Nakamura, Yoshitaka Takezawa
  • Patent number: 11840600
    Abstract: A cured epoxy resin, which is a cured product of an epoxy compound having a mesogenic structure and a curing agent having a molecular chain or a flexible backbone with a molecular weight of 100 or more, the cured epoxy resin having a smectic structure; a cured epoxy resin, which is a cured product of an epoxy compound having a mesogenic structure and a curing agent having a molecular chain or a flexible backbone with a molecular weight of 100 or more, the cured epoxy resin not having a smectic structure; an epoxy resin composition, comprising an epoxy compound having a mesogenic structure and a curing agent having a molecular chain with a molecular weight of 100 or more; and an epoxy resin composition, comprising an epoxy compound having a mesogenic structure and a curing agent having a flexible backbone with a molecular weight of 100 or more.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: December 12, 2023
    Assignee: RESONAC CORPORATION
    Inventors: Kazumasa Fukuda, Yoshitaka Takezawa, Naoki Maruyama, Yuka Yoshida, Tomoko Higashiuchi
  • Patent number: 11840619
    Abstract: Provided are an epoxy resin composition including hexagonal boron nitride particles having an aspect ratio of 2 or more, a liquid crystalline epoxy monomer, and a curing agent, and the epoxy resin composition being capable of forming a resin matrix having a smectic domain by reacting the liquid crystalline epoxy monomer with the curing agent, and a thermally-conductive material precursor, a B-stage sheet, a prepreg, a heat dissipation material, a laminate, a metal substrate, and a printed circuit board, which use the epoxy resin composition.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: December 12, 2023
    Assignee: RESONAC CORPORATION
    Inventors: Yoshitaka Takezawa, Shingo Tanaka, Fusao Hojo
  • Patent number: 11814568
    Abstract: An aspect of the present invention is an anisotropic thermal conductive resin member including a plurality of bundled thermoplastic resin stretch fibers.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: November 14, 2023
    Assignees: RESONAC CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Yoshitaka Takezawa, Masahiro Nomura
  • Publication number: 20230183415
    Abstract: A primer for forming a primer layer on the surface of a substrate having surface free energy of 50 mN/m or higher, the primer including a liquid crystalline epoxy compound and a curing agent.
    Type: Application
    Filed: May 13, 2021
    Publication date: June 15, 2023
    Applicant: Showa Denko Materials Co., Ltd.
    Inventors: Ning TANG, Shingo TANAKA, Yoshitaka TAKEZAWA
  • Patent number: 11560476
    Abstract: An epoxy resin, comprising an epoxy compound A that has at least two mesogenic structures and at least one phenylene group, and an epoxy compound B that has at least two mesogenic structures and at least one divalent biphenyl group.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 24, 2023
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Naoki Maruyama, Yuka Yoshida, Tomoko Higashiuchi, Kazumasa Fukuda, Keiichiro Nishimura, Yoshitaka Takezawa
  • Patent number: 11535700
    Abstract: Provided is an epoxy polymer which has a mesogen skeleton and a structural unit represented by Formula (A). In Formula (A), each R5 independently represents an alkyl group having from 1 to 8 carbon atoms, and n represents an integer of 0 to 3.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: December 27, 2022
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Hideyuki Katagi, Naoki Maruyama, Yuka Yoshida, Tomoko Higashiuchi, Yoshitaka Takezawa
  • Patent number: 11466119
    Abstract: An epoxy resin, comprising an epoxy compound having a mesogenic structure, the epoxy compound comprising a first epoxy compound having one biphenyl structure in a molecule and a second epoxy compound that is different from the first epoxy compound, at a mass ratio of the first epoxy compound to the second epoxy compound (first epoxy compound:second epoxy compound) of from 10:100 to 50:100.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: October 11, 2022
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Kazumasa Fukuda, Yoshitaka Takezawa, Naoki Maruyama, Yuka Yoshida, Tomoko Higashiuchi
  • Patent number: 11440990
    Abstract: An epoxy resin, comprising an epoxy compound having at least two mesogenic structures and at least one divalent biphenyl group.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 13, 2022
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Yuka Yoshida, Naoki Maruyama, Tomoko Higashiuchi, Kazumasa Fukuda, Keiichiro Nishimura, Yoshitaka Takezawa
  • Patent number: 11352562
    Abstract: An epoxy resin, comprising an epoxy compound having a mesogenic structure, and having a value of ??2/??1 equal to 3 or less, wherein ??1 is an initial dynamic shear viscosity (Pa·s) and ??2 is a maximum value of dynamic shear viscosity (Pa·s), in a measurement of dynamic shear viscosity.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: June 7, 2022
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Tomoko Higashiuchi, Naoki Maruyama, Kazumasa Fukuda, Yoshitaka Takezawa, Hideyuki Katagi, Yuki Nakamura
  • Publication number: 20220162374
    Abstract: An epoxy resin includes a reaction product between: an epoxy compound having a mesogenic structure; and at least one selected from the group consisting of an aromatic hydroxycarboxylic acid having a carboxy group and a hydroxy group bonded to an aromatic ring and an aromatic dicarboxylic acid having two carboxy groups bonded to an aromatic group.
    Type: Application
    Filed: March 27, 2019
    Publication date: May 26, 2022
    Inventors: Hideyuki KATAGI, Yuki NAKAMURA, Kazumasa FUKUDA, Tomohiro IKEDA, Lin TIAN, Kei TOUGASAKI, Naoki MARUYAMA, Yoshitaka TAKEZAWA
  • Publication number: 20220089930
    Abstract: One aspect of the present invention is an anisotropic heat-conducting resin member provided with a first fiber group including multiple stretched thermoplastic resin fibers that have been bundled and a second fiber group and a third fiber group that the first fiber group branches to.
    Type: Application
    Filed: January 29, 2020
    Publication date: March 24, 2022
    Applicants: Showa Denko Materials Co., Ltd., The University of Tokyo
    Inventors: Yoshitaka TAKEZAWA, Masahiro NOMURA
  • Publication number: 20220049046
    Abstract: An epoxy resin includes an epoxy compound having a mesogenic structure, a cured product of the epoxy resin having a flexural modulus of 3.0 GPa or more at 23° C., a fracture toughness of 1.0 MPa·m1/2 or more, and a glass transition temperature of 150° C. or higher.
    Type: Application
    Filed: September 10, 2018
    Publication date: February 17, 2022
    Inventors: Naoki MARUYAMA, Tomoko HIGASHIUCHI, Kazumasa FUKUDA, Hideyuki KATAGI, Yuki NAKAMURA, Yoshitaka TAKEZAWA
  • Publication number: 20220025107
    Abstract: An epoxy resin B-stage film obtained by semi-curing an epoxy resin composition, the epoxy resin composition including: a liquid crystalline epoxy monomer capable of forming a cured product that includes a liquid crystal structure; and a curing agent, in which the epoxy resin B-stage film has an average thickness of less than 8 ?m, and in which the liquid crystal structure included in the cured product turns into a liquid crystal structure, in which molecules are orientated in a film thickness direction, by being cured.
    Type: Application
    Filed: December 11, 2018
    Publication date: January 27, 2022
    Inventors: Shingo TANAKA, Yoshitaka TAKEZAWA, Kazuya KIGUCHI
  • Patent number: 11208525
    Abstract: An epoxy resin obtained by a reaction of an epoxy resin monomer having a mesogen backbone and having two glycidyl groups in one molecule with a divalent phenol compound having, as substituents, two hydroxyl groups on one benzene ring, in which a number average molecular weight in gel permeation chromatographic measurement is from 600 to 2,500.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: December 28, 2021
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Hideyuki Katagi, Kenji Tanaka, Yoshitaka Takezawa, Haruaki Sue, Shinichi Kosugi
  • Publication number: 20210351102
    Abstract: This heat radiation material contains metal particles and a resin, and has a structure in which the metal particles are localized in at least one surface side.
    Type: Application
    Filed: October 4, 2018
    Publication date: November 11, 2021
    Applicant: Showa Denko Materials Co., Ltd.
    Inventors: Maki ITO, Takashi ANDOU, Yoshitaka TAKEZAWA
  • Publication number: 20210345518
    Abstract: A device which includes a heat generator, a resinous housing covering the heat generator, and a heat radiation material disposed on at least some of the surfaces of the heat generator, wherein the heat radiation material includes metal particles and a resin and has a region where the metal particles arranged along the surface direction are present at a relatively high density.
    Type: Application
    Filed: September 11, 2019
    Publication date: November 4, 2021
    Applicant: Showa Denko Materials Co., Ltd.
    Inventors: Maki TAKAHASHI, Takashi ANDOU, Yoshitaka TAKEZAWA, Takanobu KOBAYASHI, Naoki MARUYAMA
  • Publication number: 20210332281
    Abstract: A heat radiation material which includes metal particles and a resin and has a region inside where the metal particles arranged along the surface direction are present in a relatively high density.
    Type: Application
    Filed: September 11, 2019
    Publication date: October 28, 2021
    Applicant: Showa Denko Materials Co., Ltd.
    Inventors: Maki TAKAHASHI, Takashi ANDOU, Yoshitaka TAKEZAWA, Takanobu KOBAYASHI, Naoki MARUYAMA