Patents by Inventor Yuka Kondo

Yuka Kondo 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).

  • AlN SINTERED COMPACT, AlN SUBSTRATE AND METHOD OF PRODUCING AlN SUBSTRATE
    Publication number: 20170152425
    Abstract: An AlN sintered compact includes AlN crystal grains and a grain boundary phase, and the grain boundary phase is lower in Vickers hardness than the AlN crystal grains.
    Type: Application
    Filed: April 14, 2015
    Publication date: June 1, 2017
    Inventors: Hideaki Awata, Katsuhito Yoshida, Koichi Sogabe, Yoshiyuki Hirose, Yasushi Itoh, Noboru Uenishi, Yuka Kondo, Sadamu Ishidu, Takehisa Yamamoto
  • Separator for lithium ion secondary battery, method for manufacture thereof, and lithium ion secondary battery
    Patent number: 8741489
    Abstract: Disclosed are a separator for lithium ion secondary batteries, having an inorganic layer formed from inorganic particles, characterized in that the inorganic particles have a particle diameter distribution in which the 50% cumulative particle diameter D50 is in the range of 100 nm to 500 nm, the 10% cumulative particle diameter D10 is 0.5D50 or more, and the 90% cumulative particle diameter D90 is 2D50 or less; a method for manufacturing the separator; and a lithium ion secondary battery using the separator. When the separator is used, there can be produced a lithium ion secondary battery in which a short circuit caused by contraction or melting can be definitely prevented, as well as the current density applied to the electrodes during charging and discharging is uniform so that charging and discharging can be efficiently achieved.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: June 3, 2014
    Assignee: Japan Vilene Company, Ltd.
    Inventors: Hiroshi Ohnishi, Te Hyon Cho, Yuka Kondo, Yoshikazu Miyata, Tatsuo Nakamura, Hiroaki Yamazaki, Masanao Tanaka
  • Lithium ion secondary battery
    Patent number: 8546025
    Abstract: Disclosed is a lithium ion secondary battery, in which comprises a vinyl alcohol polymer or a derivative thereof in an amount of 0.3 mg or more per 1 mAh of battery capacity in terms of a vinyl alcohol unit moiety content. The lithium ion secondary battery can decrease the battery voltage under high-temperature conditions and cannot be recharged after being exposed to high-temperature conditions.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: October 1, 2013
    Assignees: Japan Vilene Company, Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Masanao Tanaka, Tatsuo Nakamura, Hiroshi Ohnishi, Yuka Kondo, Koji Kimura, Te Hyon Cho, Tetsuo Sakai
  • LITHIUM ION SECONDARY BATTERY
    Publication number: 20110262817
    Abstract: Disclosed is a lithium ion secondary battery, in which comprises a vinyl alcohol polymer or a derivative thereof in an amount of 0.3 mg or more per 1 mAh of battery capacity in terms of a vinyl alcohol unit moiety content. The lithium ion secondary battery can decrease the battery voltage under high-temperature conditions and cannot be recharged after being exposed to high-temperature conditions.
    Type: Application
    Filed: August 21, 2008
    Publication date: October 27, 2011
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, JAPAN VILENE COMPANY, LTD.
    Inventors: Masanao Tanaka, Tatsuo Nakamura, Hiroshi Ohnishi, Yuka Kondo, Koji Kimura, Te Hyon Cho, Tetsuo Sakai
  • SEPARATOR FOR LITHIUM ION SECONDARY BATTERY, METHOD FOR MANUFACTURE THEREOF, AND LITHIUM ION SECONDARY BATTERY
    Publication number: 20110171535
    Abstract: Disclosed are a separator for lithium ion secondary batteries, having an inorganic layer formed from inorganic particles, characterized in that the inorganic particles have a particle diameter distribution in which the 50% cumulative particle diameter D50 is in the range of 100 nm to 500 nm, the 10% cumulative particle diameter D10 is 0.5D50 or more, and the 90% cumulative particle diameter D90 is 2D50 or less; a method for manufacturing the separator; and a lithium ion secondary battery using the separator. When the separator is used, there can be produced a lithium ion secondary battery in which a short circuit caused by contraction or melting can be definitely prevented, as well as the current density applied to the electrodes during charging and discharging is uniform so that charging and discharging can be efficiently achieved.
    Type: Application
    Filed: September 11, 2009
    Publication date: July 14, 2011
    Applicant: JAPAN VILENE COMPANY, LTD.
    Inventors: Hiroshi Ohinshi, Te Hyon Cho, Yuka Kondo, Yoshikazu Miyata, Tatsuo Nakamura, Hiroaki Yamazaki, Masanao Tanaka