Patents by Inventor Kiyokazu Oikawa

Kiyokazu Oikawa 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).

  • BAG-LIKE SEPARATOR, ELECTRODE SEPARATOR ASSEMBLY, AND METHOD OF PRODUCING ELECTRODE SEPARATOR ASSEMBLY
    Publication number: 20130280582
    Abstract: Four sides of a rectangular bag-like separator 10 are composed of two adjacent separator thermo-bonding sides 10a and 10c where thermo-bonding portions are formed and of two adjacent insertion opening sides 10b and 10d forming one insertion opening 11 into which an electrode 30 can be inserted. A thermo-bonding section is formed in a portion of at least one of the insertion opening sides 10b and 10d.
    Type: Application
    Filed: June 24, 2013
    Publication date: October 24, 2013
    Inventor: Kiyokazu Oikawa
  • Bag-like separator, electrode separator assembly, and method of producing electrode separator assembly
    Patent number: 8497032
    Abstract: Four sides of a rectangular bag-like separator 10 are composed of two adjacent separator thermo-bonding sides 10a and 10c where thermo-bonding portions are formed and of two adjacent insertion opening sides 10b and 10d forming one insertion opening 11 into which an electrode 30 can be inserted. A thermo-bonding section is formed in a portion of at least one of the insertion opening sides 10b and 10d.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: July 30, 2013
    Assignee: NEC Corporation
    Inventor: Kiyokazu Oikawa
  • BAG-LIKE SEPARATOR, ELECTRODE SEPARATOR ASSEMBLY, AND METHOD OF PRODUCING ELECTRODE SEPARATOR ASSEMBLY
    Publication number: 20100099021
    Abstract: Four sides of a rectangular bag-like separator 10 are composed of two adjacent separator thermo-bonding sides 10a and 10c where thermo-bonding portions are formed and of two adjacent insertion opening sides 10b and 10d forming one insertion opening 11 into which an electrode 30 can be inserted. A thermo-bonding section is formed in a portion of at least one of the insertion opening sides 10b and 10d.
    Type: Application
    Filed: January 18, 2008
    Publication date: April 22, 2010
    Applicant: NEC CORPORATION
    Inventor: Kiyokazu Oikawa
  • Film-covered electric device having pressure release opening
    Patent number: 7579111
    Abstract: A film-covered electric device has an electric device element and casing films. The casing films include a sealing area formed by thermally fusing the facing surfaces of the casing films together around the periphery of the electric device element, an electric device element receiving part encapsulating the electric device element inside the sealing area, and unfused portions formed in the shape of cove communicating with the electric device element receiving part. The casing films further include a stress concentrating portion touching the unfused portions for concentrating thereon the peeling stress of the casing films generated at the sealing area by the expansion of the electric device element receiving part, and a pressure releasing part is formed in the stress concentrating portion.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: August 25, 2009
    Assignee: NEC Corporation
    Inventors: Masatomo Mizuta, Hiroshi Yageta, Makihiro Otohata, Kiyokazu Oikawa, Toshihiko Mankyu
  • FILM-COVERED ELECTRIC DEVICE HAVING PRESSURE RELEASE OPENING
    Publication number: 20080008936
    Abstract: A film-covered electric device has an electric device element and casing films. The casing films include a sealing area formed by thermally fusing the facing surfaces of the casing films together around the periphery of the electric device element, an electric device element receiving part encapsulating the electric device element inside the sealing area, and unfused portions formed in the shape of cove communicating with the electric device element receiving part. The casing films further include a stress concentrating portion touching the unfused portions for concentrating thereon the peeling stress of the casing films generated at the sealing area by the expansion of the electric device element receiving part, and a pressure releasing part is formed in the stress concentrating portion.
    Type: Application
    Filed: July 31, 2007
    Publication date: January 10, 2008
    Applicant: NEC LAMILION ENERGY, LTD.
    Inventors: Masatomo Mizuta, Hiroshi Yageta, Makihiro Otohata, Kiyokazu Oikawa, Toshihiko Mankyu
  • Film-covered electric device having pressure release opening
    Patent number: 7267906
    Abstract: A film-covered electric device has an electric device element and casing films. The casing films include a sealing area formed by thermally fusing the facing surfaces of the casing films together around the periphery of the electric device element, an electric device element receiving part encapsulating the electric device element inside the sealing area, and unfused portions formed in the shape of cove communicating with the electric device element receiving part. The casing films further include a stress concentrating portion touching the unfused portions for concentrating thereon the peeling stress of the casing films generated at the sealing area by the expansion of the electric device element receiving part, and a pressure releasing part is formed in the stress concentrating portion.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: September 11, 2007
    Assignee: NEC Corporation
    Inventors: Masatomo Mizuta, Hiroshi Yageta, Makihiro Otohata, Kiyokazu Oikawa, Toshihiko Mankyu
  • Film-covered electric device having pressure release opening
    Publication number: 20050158622
    Abstract: A film-covered electric device has an electric device element and casing films. The casing films include a sealing area formed by thermally fusing the facing surfaces of the casing films together around the periphery of the electric device element, an electric device element receiving part encapsulating the electric device element inside the sealing area, and unfused portions formed in the shape of cove communicating with the electric device element receiving part. The casing films further include a stress concentrating portion touching the unfused portions for concentrating thereon the peeling stress of the casing films generated at the sealing area by the expansion of the electric device element receiving part, and a pressure releasing part is formed in the stress concentrating portion.
    Type: Application
    Filed: January 14, 2005
    Publication date: July 21, 2005
    Inventors: Masatomo Mizuta, Hiroshi Yageta, Makihiro Otohata, Kiyokazu Oikawa, Toshihiko Mankyu