Patents by Inventor Hideki Tsubata

Hideki Tsubata 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).

  • Nonaqueous secondary battery and method of using the same
    Patent number: 9077035
    Abstract: A nonaqueous secondary battery containing a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, wherein the positive electrode comprises, as active materials, two or more lithium-containing transition metal oxides having different average particle sizes, and the lithium-containing transition metal oxide having the smallest average particle size contains one or more of Mg, Ti, Zr, Ge, Nb, Al and Sn.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: July 7, 2015
    Assignee: HITACHI MAXELL, LTD.
    Inventors: Fusaji Kita, Hideki Tsubata, Hiroyasu Inoue
  • Nonaqueous secondary battery and method of using the same
    Patent number: 8137840
    Abstract: A nonaqueous secondary battery containing a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, in which the positive electrode comprises, as active materials, three or more lithium-containing transition metal oxides having different average particle sizes, those transition metal oxides comprise a transition metal element, the transition metal element of the transition metal oxide having the smallest average particle size is partially substituted with a metal element other than the transition metal element, and the density of the positive electrode mixture layer is t 3.8 g/cm3 or more.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: March 20, 2012
    Assignee: Hitachi Maxell Energy, Ltd.
    Inventors: Fusaji Kita, Hideki Tsubata, Hiroyasu Inoue
  • Nonaqueous secondary battery and method of using the same
    Publication number: 20070224504
    Abstract: A nonaqueous secondary battery containing a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, wherein the positive electrode comprises, as active materials, two or more lithium-containing transition metal oxides having different average particle sizes, and the lithium-containing transition metal oxide having the smallest average particle size contains one or more of Mg, Ti, Zr, Ge, Nb, Al and Sn.
    Type: Application
    Filed: March 16, 2007
    Publication date: September 27, 2007
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Fusaji Kita, Hideki Tsubata, Hiroyasu Inoue
  • Nonaqueous secondary battery and method of using the same
    Publication number: 20070224505
    Abstract: A nonaqueous secondary battery containing a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, in which the positive electrode comprises, as active materials, three or more lithium-containing transition metal oxides having different average particle sizes, those transition metal oxides comprise a transition metal element, the transition metal element of the transition metal oxide having the smallest average particle size is partially substituted with a metal element other than the transition metal element, and the density of the positive electrode mixture layer is t 3.8 g/cm3 or more.
    Type: Application
    Filed: March 27, 2007
    Publication date: September 27, 2007
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Fusaji Kita, Hideki Tsubata, Hiroyasu Inoue