Patents by Inventor Koichi UKIGAYA

Koichi UKIGAYA 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: 20210045269
    Abstract: The present invention provides an electromagnetic wave absorbing sheet which contains conductive short fibers and an insulating material, and which exhibits particularly high radio wave absorbing properties in one direction.
    Type: Application
    Filed: January 29, 2019
    Publication date: February 11, 2021
    Applicant: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Shinji NARUSE, Tatsushi FUJIMORI, Koichi UKIGAYA, Yasunori TANAKA
  • Publication number: 20210029854
    Abstract: The present invention provides an electromagnetic wave absorbing sheet which contains: conductive short fibers; and soft magnetic particles, each of which is covered by an insulating material.
    Type: Application
    Filed: January 29, 2019
    Publication date: January 28, 2021
    Applicant: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Shinji NARUSE, Tatsushi FUJIMORI, Koichi UKIGAYA, Yasunori TANAKA
  • Publication number: 20200361186
    Abstract: There is provided a fiber-reinforced body comprising a fiber component; a matrix component; and a sheet component, wherein the matrix component and the sheet component exhibit an interpenetrating ability; and a member comprising said fiber-reinforced body. The fiber-reinforced body is excellent in terms of bending impact resistance.
    Type: Application
    Filed: July 13, 2018
    Publication date: November 19, 2020
    Applicants: THE UNIVERSITY OF TOKYO, DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Zaoyang LI, Isamu OHSAWA, Hiroaki ZUSHI, Jun TAKAHASHI, Shinji NARUSE, Tatsushi FUJIMORI, Koichi UKIGAYA, Chihiro KONDO, Toshitsugu MATSUKI
  • Patent number: 10836112
    Abstract: Provided is a method for producing a laminate, comprising laminating an aramid paper sheet and a polyimide film together by performing heating and pressurizing process under conditions of a temperature of 275 to 320° C. and a pressure of 50 to 400 kgf/cm. In the present invention, an aramid paper sheet-polyimide film laminate with excellent heat resistance, electrical properties, chemical resistance, mechanical properties, and the like can be manufactured by laminating the aramid paper sheet and the polyimide film in a simple method without impairing their properties.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: November 17, 2020
    Assignee: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Koichi Ukigaya, Tatsushi Fujimori, Shinji Naruse, Chihiro Kondo, Yasunori Tanaka
  • Patent number: 10654247
    Abstract: The present invention provides an electromagnetic wave suppression sheet provided with: an absorption layer which has surface resistivity of at least 100?/? and which contains an electrical conductive material and an insulating material in the state where the electrical conductive material and the insulating material are in direct contact with each other, the insulating material having a dielectric loss tangent of 0.01 or larger at a frequency of 60 Hz at 20° C.; and a contact layer which is formed on a surface, of the absorption layer, opposite to a surface to be irradiated with electromagnetic waves and of which a surface in contact with the absorption layer has surface resistivity of at least 20?/?.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: May 19, 2020
    Assignee: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Shinji Naruse, Tatsushi Fujimori, Koichi Ukigaya, Chihiro Kondo, Yasunori Tanaka
  • Publication number: 20200061966
    Abstract: The present invention provides an electromagnetic wave suppression sheet provided with: an absorption layer which has surface resistivity of at least 100 ?/? and which contains an electrical conductive material and an insulating material in the state where the electrical conductive material and the insulating material are in direct contact with each other, the insulating material having a dielectric loss tangent of 0.01 or larger at a frequency of 60 Hz at 20° C.; and a contact layer which is formed on a surface, of the absorption layer, opposite to a surface to be irradiated with electromagnetic waves and of which a surface in contact with the absorption layer has surface resistivity of at least 20 ?/?.
    Type: Application
    Filed: November 20, 2017
    Publication date: February 27, 2020
    Applicant: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Shinji NARUSE, Tatsushi FUJIMORI, Koichi UKIGAYA, Chihiro KONDO, Yasunori TANAKA
  • Publication number: 20190061270
    Abstract: Provided is a method for producing a laminate, comprising laminating an aramid paper sheet and a polyimide film together by performing heating and pressurizing process under conditions of a temperature of 275 to 320° C. and a pressure of 50 to 400 kgf/cm. In the present invention, an aramid paper sheet-polyimide film laminate with excellent heat resistance, electrical properties, chemical resistance, mechanical properties, and the like can be manufactured by laminating the aramid paper sheet and the polyimide film in a simple method without impairing their properties.
    Type: Application
    Filed: February 8, 2017
    Publication date: February 28, 2019
    Applicant: DUPONT TEIJIN ADVANCED PAPERS (JAPAN), LTD.
    Inventors: Koichi UKIGAYA, Tatsushi FUJIMORI, Shinji NARUSE, Chihiro KONDO, Yasunori TANAKA