Patents by Inventor Koji Higashibata

Koji Higashibata 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).

  • Current/voltage non-linear resistor and sintered body therefor
    Patent number: 6627100
    Abstract: A current/voltage non-linear resistor comprises a sintered body having a main component of ZnO, an electrode applied to a surface of the sintered body and an insulation material applied to another surface of the sintered body. The main component containing, as auxiliary components, Bi, Co, Mn, Sb, Ni and Al, and the contents of the auxiliary components are respectively expressed as Bi2O3, Co2O3, MnO, Sb2O3, NiO and Al3+, of Bi2O3: 0.3 to 2 mol %, Co2O3: 0.3 to 1.5 mol %, MnO: 0.4 to 6 mol %, Sb2O3: 0.8 to 7 mol %, NiO: 0.5 to 5 mol % and Al3+: 0.001 to 0.02 mol %; a Bi2O3 crystalline phase in the sintered body including an &agr;-Bi2O3 phase representing at least 80% of the total Bi2O3 phase.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: September 30, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideyasu Ando, Takeshi Udagawa, Yoshiyasu Ito, Hironori Suzuki, Hiroyoshi Narita, Koji Higashibata, Toshiya Imai, Kiyokazu Umehara, Yoshikazu Tanno
  • Current/voltage non-linear resistor and sintered body therefor
    Publication number: 20020121960
    Abstract: A current/voltage non-linear resistor comprises a sintered body having a main component of ZnO, an electrode applied to a surface of the sintered body and an insulation material applied to another surface of the sintered body. The main component containing, as auxiliary components, Bi, Co, Mn, Sb, Ni and Al, and the contents of the auxiliary components are respectively expressed as Bi2O3, Co2O3, MnO, Sb2O3, NiO and Al3+, of Bi2O3: 0.3 to 2 mol %, Co2O3: 0.3 to 1.5 mol %, MnO: 0.4 to 6 mol %, Sb2O3: 0.8 to 7 mol %, NiO: 0.5 to 5 mol % and Al3+: 0.001 to 0.02 mol %; a Bi2O3 crystalline phase in the sintered body including an &agr;-Bi2O3 phase representing at least 80% of the total Bi2O3 phase.
    Type: Application
    Filed: April 25, 2001
    Publication date: September 5, 2002
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideyasu Ando, Takeshi Udagawa, Yoshiyasu Ito, Hironori Suzuki, Hiroyoshi Narita, Koji Higashibata, Toshiya Imai, Kiyokazu Umehara, Yoshikazu Tanno