Patents by Inventor Toyokazu Ito

Toyokazu Ito 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: 10741470
    Abstract: Disclosed are a heat conductive sheet including a resin and a particulate carbon material, and having a thermal resistance value under a pressure of 0.05 MPa of 0.20° C./W or less, a heat dissipation device including the heat conductive sheet interposed between a heat source and a heat radiator, and a method of producing a heat conductive sheet.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 11, 2020
    Assignee: ZEON CORPORATION
    Inventors: Toyokazu Ito, Hiromi Kitagawa, Gen Kobayashi
  • Patent number: 10731067
    Abstract: Disclosed are a heat conductive sheet including a resin and a particulate carbon material, and having an Asker C hardness at 25° C. of 60 or more and a thermal resistance value under a pressure of 0.5 MPa of 0.20° C./W or less, a method of producing a heat conductive sheet, and a heat dissipation device including the heat conductive sheet interposed between a heat source and a heat radiator.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 4, 2020
    Assignee: ZEON CORPORATION
    Inventors: Toyokazu Ito, Hiromi Kitagawa, Gen Kobayashi
  • Patent number: 10724810
    Abstract: Disclosed is a heat conductive sheet which comprises a flame retardant resin and a particulate carbon material, wherein the particulate carbon material has a particle size distribution in which a frequency of particles having a particle diameter of 30 ?m or more and 150 ?m or less is 20% or more, an amount of the particulate carbon material in the heat conductive sheet is 30% by mass or more, and a thickness of the heat conductive sheet is 50 ?m or more and 120 ?m or less. Preferably, the flame retardant resin is a combination of a flame retardant resin that is solid at ordinary temperature and ordinary pressure and a flame retardant resin that is liquid at ordinary temperature and ordinary pressure.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: July 28, 2020
    Assignee: ZEON CORPORATION
    Inventors: Toyokazu Ito, Hiromi Kitagawa
  • Patent number: 10703952
    Abstract: A thermally conductive sheet includes a resin that is liquid under normal temperature and pressure, a resin that is solid under normal temperature and pressure, and a particulate carbon material, and the thermal resistance of the thermally conductive sheet under a pressure of 0.05 MPa is at most 0.30° C/W. In the thermally conductive sheet, the resin that is solid under normal temperature and pressure is preferably a thermoplastic fluororesin that is solid under normal temperature and pressure, and the resin that is liquid under normal temperature and pressure is preferably a thermoplastic fluororesin that is liquid under normal temperature and pressure.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: July 7, 2020
    Assignee: ZEON CORPORATION
    Inventors: Toyokazu Ito, Masaya Miyamura, Gen Kobayashi
  • Publication number: 20200101701
    Abstract: Disclosed is a method of producing a secondary sheet. The method comprises shaping a composition containing a resin and a particulate carbon material with a content of the particulate carbon material being 50% by mass or less into a sheet by pressure application to provide a primary sheet having a tensile strength of 1.5 MPa or less; obtaining a laminate comprising two or more layers formed either by stacking a plurality of the primary sheets on top of each other or by folding or rolling the primary sheet; and slicing the laminate at an angle of 45° or less relative to the stacking direction to obtain a secondary sheet.
    Type: Application
    Filed: December 3, 2019
    Publication date: April 2, 2020
    Applicant: ZEON CORPORATION
    Inventors: Toyokazu ITO, Keisuke ITO
  • Publication number: 20190244875
    Abstract: Disclosed are a heat conductive sheet including a resin and a particulate carbon material, and having a thermal resistance value under a pressure of 0.05 MPa of 0.20° C./W or less, a heat dissipation device including the heat conductive sheet interposed between a heat source and a heat radiator, and a method of producing a heat conductive sheet.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 8, 2019
    Applicant: ZEON CORPORATION
    Inventors: Toyokazu ITO, Hiromi KITAGAWA, Gen KOBAYASHI
  • Publication number: 20190054718
    Abstract: Disclosed are a laminate having two or more layers formed from at least one primary sheet, the at least one primary sheet containing a resin and a particulate carbon material with a content of the particulate carbon material being 50% by mass or less, and the at least one primary sheet having a tensile strength of 1.5 MPa or less, a method of producing the same, a secondary sheet that contains a resin and a particulate carbon material with a content of the particulate carbon material being 50% by mass or less, where the particulate carbon material is aligned in the thickness direction, and that has a curl index of 0.33 or less, and a method of producing the secondary sheet.
    Type: Application
    Filed: February 17, 2017
    Publication date: February 21, 2019
    Applicant: ZEON CORPORATION
    Inventors: Toyokazu ITO, Keisuke ITO
  • Publication number: 20190048244
    Abstract: Disclosed are a heat conductive sheet including a resin and a particulate carbon material, and having an Asker C hardness at 25° C. of 60 or more and a thermal resistance value under a pressure of 0.5 MPa of 0.20° C./W or less, a method of producing a heat conductive sheet, and a heat dissipation device including the heat conductive sheet interposed between a heat source and a heat radiator.
    Type: Application
    Filed: February 17, 2017
    Publication date: February 14, 2019
    Applicant: ZEON CORPORATION
    Inventors: Toyokazu ITO, Hiromi KITAGAWA, Gen KOBAYASHI
  • Publication number: 20180231337
    Abstract: Disclosed is a heat conductive sheet which includes strips joined together side-by-side, each strip including a resin and a carbon material having a number-based modal diameter of 5 ?m to 50 ?m, wherein the heat conductive sheet has heat conductivity in thickness direction of 40 W/m·k or more.
    Type: Application
    Filed: August 23, 2016
    Publication date: August 16, 2018
    Applicant: ZEON CORPORATION
    Inventors: Toyokazu ITO, Takurou KUMAMOTO, Yasuyuki MURAKAMI
  • Publication number: 20180223147
    Abstract: A thermally conductive sheet includes a resin that is liquid under normal temperature and pressure, a resin that is solid under normal temperature and pressure, and a particulate carbon material, and the thermal resistance of the thermally conductive sheet under a pressure of 0.05 MPa is at most 0.30° C./W. In the thermally conductive sheet, the resin that is solid under normal temperature and pressure is preferably a thermoplastic fluororesin that is solid under normal temperature and pressure, and the resin that is liquid under normal temperature and pressure is preferably a thermoplastic fluororesin that is liquid under normal temperature and pressure.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 9, 2018
    Applicant: ZEON CORPORATION
    Inventors: Toyokazu Ito, Masaya Miyamura, Gen Kobayashi