Patents by Inventor Bungo Sakurai

Bungo Sakurai 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).

  • Separator and lithium ion secondary battery including the same
    Patent number: 10217984
    Abstract: A separator according to the embodiment includes a porous base material having a thermoplastic resin. The porous base material has a heat-resistant porous layer on at least one surface thereof. The heat-resistant porous layer contains inorganic particles, a resin, and sulfur. A lithium ion secondary battery according to the embodiment, includes: the separator interposed between a positive electrode and a negative electrode; and an electrolyte solution. The heat-resistant porous layer is disposed between the positive electrode and the porous base material. Sulfur is distributed unevenly in the heat-resistant porous layer so as to exist in larger amount near a surface thereof opposite to the porous base material.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: February 26, 2019
    Assignee: TDK CORPORATION
    Inventors: Masahiro Saegusa, Hirokazu Ohnuma, Bungo Sakurai
  • SEPARATOR AND LITHIUM ION SECONDARY BATTERY INCLUDING THE SAME
    Publication number: 20160093858
    Abstract: A separator according to the embodiment includes a porous base material having a thermoplastic resin. The porous base material has a heat-resistant porous layer on at least one surface thereof. The heat-resistant porous layer contains inorganic particles, a resin, and sulfur. A lithium ion secondary battery according to the embodiment, includes: the separator interposed between a positive electrode and a negative electrode; and an electrolyte solution. The heat-resistant porous layer is disposed between the positive electrode and the porous base material. Sulfur is distributed unevenly in the heat-resistant porous layer so as to exist in larger amount near a surface thereof opposite to the porous base material.
    Type: Application
    Filed: September 29, 2015
    Publication date: March 31, 2016
    Inventors: Masahiro SAEGUSA, Hirokazu OHNUMA, Bungo SAKURAI
  • Ferrite material
    Patent number: 6736990
    Abstract: There can be provided an NiCuZn-based ferrite material containing an iron oxide, a copper oxide, zinc oxide and a nickel oxide in predetermined amounts as main components and a bismuth oxide, a silicon oxide, magnesium oxide and a cobalt oxide in predetermined amounts as additional components. Due to the predetermined amounts of the additional components, the ferrite material has an extremely good temperature characteristic (a change in permeability along with a change in temperature is small), a high quality coefficient Q and high strength.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: May 18, 2004
    Assignee: TDK Corporation
    Inventors: Takuya Aoki, Ko Ito, Bungo Sakurai, Yukio Takahashi, Tatsuya Shimazaki, Hidenobu Umeda, Akinori Ohi
  • Ferrite material
    Publication number: 20020175311
    Abstract: There can be provided an NiCuZn-based ferrite material containing an iron oxide, a copper oxide, zinc oxide and a nickel oxide in predetermined amounts as main components and a bismuth oxide, a silicon oxide, magnesium oxide and a cobalt oxide in predetermined amounts as additional components. Due to the predetermined amounts of the additional components, the ferrite material has an extremely good temperature characteristic (a change in permeability along with a change in temperature is small), a high quality coefficient Q and high strength.
    Type: Application
    Filed: March 7, 2002
    Publication date: November 28, 2002
    Inventors: Takuya Aoki, Ko Ito, Bungo Sakurai, Yukio Takahashi, Tatsuya Shimazaki, Hidenoru Umeda, Akinori Ohi