Patents by Inventor Asuka MURAI

Asuka MURAI 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: 10074476
    Abstract: A ferrite composition composed of a main component including 26 to 46 mol % of an iron oxide in terms of Fe2O3, 4 to 14 mol % of a copper oxide in terms of CuO, 0 to 26 mol % of a zinc oxide in terms of ZnO, and a residue of 40.0 mol % or more of a nickel oxide in terms of NiO. The ferrite composition, with respect to 100 parts by weight of the main component, is also composed of a subcomponent including 0.8 to 10.0 parts by weight of a silicon compound in terms of SiO2, 1.0 to 15.0 parts by weight of a cobalt compound in terms of Co3O4, and 0.7 to 30.0 parts by weight of a bismuth compound in terms of Bi2O3. A value of the cobalt compound content in terms of Co3O4 divided by the silicon compound content in terms of SiO2 is 0.4 to 5.5.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: September 11, 2018
    Assignee: TDK CORPORATION
    Inventors: Hiroki Choto, Takeshi Shibayama, Ryuichi Wada, Kouichi Kakuda, Yukari Akita, Asuka Murai, Yukio Takahashi, Takashi Suzuki, Akinori Ohi
  • Patent number: 10020791
    Abstract: Provided is a ferrite composition composed of: a main component including 23.0 to 47.0 mole % of Fe compound in terms of Fe2O3, 3.0 to 16.0 mole % of Cu compound in terms of CuO, 4.0 to 39.0 mole % of Zn compound in terms of ZnO, 1.5 to 13.0 mole % of Si compound in terms of SiO2, and a residue of Ni compound; and a subcomponent including, with respect to 100 parts by weight of the main component, 0.1 to 8.0 parts by weight of Co compound in terms of Co3O4 and 0.25 to 5.00 parts by weight of Bi compound in terms of Bi2O3.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: July 10, 2018
    Assignee: TDK CORPORATION
    Inventors: Kouichi Kakuda, Ryuichi Wada, Yukari Akita, Yukio Takahashi, Takashi Suzuki, Asuka Murai, Hiroyuki Tanoue
  • Publication number: 20180096768
    Abstract: A ferrite composition includes a main component and an accessory component. The main component includes 18 to 30 mol % of iron oxide in terms of Fe2O3, 4 to 14 mol % of copper oxide in terms of CuO, 0 to 6 mol % of zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The accessory component includes 0.30 to 1.83 pts.wt. of silicon compound in terms of SiO2, 2.00 to 10.00 pts.wt. of cobalt compound in terms of Co3O4, and 1.00 to 3.00 pts.wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts.wt. of the main component. A cobalt compound content in terms of Co3O4 divided by a silicon compound content in terms of SiO2 is a value of 5.5 to 30.0.
    Type: Application
    Filed: September 19, 2017
    Publication date: April 5, 2018
    Applicant: TDK CORPORATION
    Inventors: Takeshi SHIBAYAMA, Asuka MURAI, Yukio TAKAHASHI, Takashi SUZUKI, Hiroyuki TANOUE, Masaki TAKAHASHI
  • Patent number: 9905365
    Abstract: Composite electronic including coil, capacitor and intermediate parts, wherein coil part includes coil-conductor and magnetic-layer, capacitor part includes internal electrodes and dielectric-layer, which contains SrO—TiO2 or ZnO—TiO2 based oxide, intermediate part between coil and capacitor parts, intermediate part includes intermediate material layer, which contains ZnO, TiO2 and boron, ZnO contained in intermediate material layer 50-85 parts by mole and TiO2 contained the intermediate material layer 15-50 parts by mole when total content of ZnO and TiO2 in intermediate material layer is 100 parts by mole, content boron in intermediate material layer is 0.1-5.0 parts by weight of B2O3 when total of ZnO and TiO2 in intermediate material layer set to 100 parts by weight, part of ZnO and TiO2 intermediate material layer constitute ZnO—TiO2 compound, which in intermediate material layer is 50 wt % or more when total weight of ZnO and TiO2 in intermediate material layer is set to 100 wt %.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: February 27, 2018
    Assignee: TDK CORPORATION
    Inventors: Kouichi Kakuda, Takashi Suzuki, Masaki Takahashi, Yukio Takahashi, Shinichi Kondo, Asuka Murai, Akihiko Oide, Naoki Uchida, Hidekazu Sato
  • Publication number: 20170025226
    Abstract: Composite electronic including coil, capacitor and intermediate parts, wherein coil part includes coil-conductor and magnetic-layer, capacitor part includes internal electrodes and dielectric-layer, which contains SrO—TiO2 or ZnO—TiO2 based oxide, intermediate part between coil and capacitor parts, intermediate part includes intermediate material layer, which contains ZnO, TiO2 and boron, ZnO contained in intermediate material layer 50-85 parts by mole and TiO2 contained the intermediate material layer 15-50 parts by mole when total content of ZnO and TiO2 in intermediate material layer is 100 parts by mole, content boron in intermediate material layer is 0.1-5.0 parts by weight of B2O3 when total of ZnO and TiO2 in intermediate material layer set to 100 parts by weight, part of ZnO and TiO2 intermediate material layer constitute ZnO—TiO2 compound, which in intermediate material layer is 50 wt % or more when total weight of ZnO and TiO2 in intermediate material layer is set to 100 wt %.
    Type: Application
    Filed: July 20, 2016
    Publication date: January 26, 2017
    Applicant: TDK CORPORATION
    Inventors: Kouichi KAKUDA, Takashi SUZUKI, Masaki TAKAHASHI, Yukio TAKAHASHI, Shinichi KONDO, Asuka MURAI, Akihiko OIDE, Naoki UCHIDA, Hidekazu SATO
  • Publication number: 20160300651
    Abstract: A ferrite composition composed of a main component including 26 to 46 mol % of an iron oxide in terms of Fe2O3, 4 to 14 mol % of a copper oxide in terms of CuO, 0 to 26 mol % of a zinc oxide in terms of ZnO, and a residue of 40.0 mol % or more of a nickel oxide in terms of NiO. The ferrite composition, with respect to 100 parts by weight of the main component, is also composed of a subcomponent including 0.8 to 10.0 parts by weight of a silicon compound in terms of SiO2, 1.0 to 15.0 parts by weight of a cobalt compound in terms of Co3O4, and 0.7 to 30.0 parts by weight of a bismuth compound in terms of Bi2O3. A value of the cobalt compound content in terms of Co3O4 divided by the silicon compound content in terms of SiO2 is 0.4 to 5.5.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 13, 2016
    Applicant: TDK CORPORATION
    Inventors: Hiroki CHOTO, Takeshi SHIBAYAMA, Ryuichi WADA, Kouichi KAKUDA, Yukari AKITA, Asuka MURAI, Yukio TAKAHASHI, Takashi SUZUKI, Akinori OHI
  • Publication number: 20160293302
    Abstract: Provided is a ferrite composition composed of: a main component including 23.0 to 47.0 mole % of Fe compound in terms of Fe2O3, 3.0 to 16.0 mole % of Cu compound in terms of CuO, 4.0 to 39.0 mole % of Zn compound in terms of ZnO, 1.5 to 13.0 mole % of Si compound in terms of SiO2, and a residue of Ni compound; and a subcomponent including, with respect to 100 parts by weight of the main component, 0.1 to 8.0 parts by weight of Co compound in terms of Co3O4 and 0.25 to 5.00 parts by weight of Bi compound in terms of Bi2O3.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 6, 2016
    Applicant: TDK CORPORATION
    Inventors: Kouichi KAKUDA, Ryuichi WADA, Yukari AKITA, Yukio TAKAHASHI, Takashi SUZUKI, Asuka MURAI, Hiroyuki TANOUE