Patents by Inventor Kazutaka Sakaki

Kazutaka Sakaki 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 electrolyte solution secondary battery separator having filler and controlled impurities
    Patent number: 8597836
    Abstract: An object of this invention is to improve battery performance such as a rate capability of a nonaqueous electrolyte solution secondary battery using a separator constituting a thermoplastic resin-based porous film containing a filler. This invention provides a nonaqueous electrolyte solution secondary battery separator which is formed from a porous film containing a thermoplastic resin and a filler contained in the thermoplastic resin and has a content of chlorine of 10 ppm or less or a content of iron of 100 ppm or less as well as relates to a nonaqueous electrolyte solution secondary battery using this separator.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: December 3, 2013
    Assignees: Mitsubishi Chemical Corporation, Mitsubishi Plastics, Inc.
    Inventors: Satoshi Nakashima, Yasushi Usami, Kazutaka Sakaki
  • NONAQUEOUS ELECTROLYTE SOLUTION SECONDARY BATTERY SEPARATOR AND NONAQUEOUS ELECTROLYTE SOLUTION SECONDARY BATTERY USING THE SAME
    Publication number: 20110165473
    Abstract: An object of this invention is to improve battery performance such as a rate capability of a nonaqueous electrolyte solution secondary battery using a separator constituting a thermoplastic resin-based porous film containing a filler. This invention provides a nonaqueous electrolyte solution secondary battery separator which is formed from a porous film containing a thermoplastic resin and a filler contained in the thermoplastic resin and has a content of chlorine of 10 ppm or less or a content of iron of 100 ppm or less as well as relates to a nonaqueous electrolyte solution secondary battery using this separator.
    Type: Application
    Filed: March 14, 2011
    Publication date: July 7, 2011
    Applicants: MITSUBISHI CHEMICAL CORPORATION, MITSUBISHI PLASTICS, INC.
    Inventors: Satoshi NAKASHIMA, Yasushi Usami, Kazutaka Sakaki
  • Nonaqueous electrolyte solution secondary battery separator and nonaqueous electrolyte solution secondary battery using the same
    Publication number: 20060127753
    Abstract: An object of this invention is to improve battery performance such as a rate capability of a nonaqueous electrolyte solution secondary battery using a separator constituting a thermoplastic resin-based porous film containing a filler. This invention provides a nonaqueous electrolyte solution secondary battery separator which is formed from a porous film containing a thermoplastic resin and a filler contained in the thermoplastic resin and has a ratio of an average pore diameter (?m) to a maximum pore diameter (?m) defined by ASTM F316-86 of 0.6 or more as well as relates to a nonaqueous electrolyte solution secondary battery using this separator.
    Type: Application
    Filed: February 6, 2006
    Publication date: June 15, 2006
    Applicants: MITSUBISHI CHEMICAL CORPORATION, Mitsubishi Plastics, Inc.
    Inventors: Satoshi Nakashima, Yasushi Usami, Kazutaka Sakaki