Patents by Inventor Keiji TAURA

Keiji TAURA 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).

  • Negative electrode active material of lithium secondary battery, secondary battery using the same, method for manufacturing the same
    Patent number: 9070933
    Abstract: A negative electrode active material of lithium secondary battery includes: at least one of a petroleum-derived green coke and a coal-derived green coke, and at least one of a petroleum-derived calcined coke and a coal-derived calcined coke within a mass ratio range of 90:10 to 10:90, and a phosphorous compound within a range of 0.1 to 6.0 parts by mass in amount equivalent to phosphor relative to 100 parts by mass of the at least one of the green cokes and the at least one of the calcined cokes.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: June 30, 2015
    Assignee: NIPPON STEEL CHEMICAL CO., LTD.
    Inventors: Taisa Ikeda, Kazuki Tagawa, Hiroshi Ono, Hideki Ono, Keiji Taura, Ryoji Akamine, Yoichi Kawano
  • NEGATIVE ELECTRODE ACTIVE MATERIAL OF LITHIUM SECONDARY BATTERY, SECONDARY BATTERY USING THE SAME, METHOD FOR MANUFACTURING THE SAME
    Publication number: 20120119138
    Abstract: A negative electrode active material of lithium secondary battery includes: at least one of a petroleum-derived green coke and a coal-derived green coke, and at least one of a petroleum-derived calcined coke and a coal-derived calcined coke within a mass ratio range of 90:10 to 10:90, and a phosphorous compound within a range of 0.1 to 6.0 parts by mass in amount equivalent to phosphor relative to 100 parts by mass of the at least one of the green cokes and the at least one of the calcined cokes.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 17, 2012
    Applicant: NIPPON STEEL CHEMICAL CO., LTD.
    Inventors: Taisa IKEDA, Kazuki TAGAWA, Hiroshi ONO, Hideki ONO, Keiji TAURA, Ryoji AKAMINE, Yoichi KAWANO