Patents by Inventor Yasuhiro Hagiuda

Yasuhiro Hagiuda 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).

  • Method for producing an insulating polyolefin laminated paper
    Patent number: 4964933
    Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: October 23, 1990
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Ryosuke Hata, Shosuke Yamanouchi, Masayuki Hirose, Hidemitsu Kuwabara, Yasuharu Mizumoto, Yasuhiro Hagiuda
  • Electric power supply cable using insulating polyolefin laminate paper
    Patent number: 4859804
    Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: August 22, 1989
    Assignee: Sumitomo Electric Industries
    Inventors: Ryosuke Hata, Shosuke Yamanouchi, Masayuki Hirose, Hidemitsu Kuwabara, Yasuharu Mizumoto, Yasuhiro Hagiuda
  • Insulating polyolefin laminate paper and method for producing same, and electric power supply cable
    Patent number: 4762965
    Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: August 9, 1988
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Ryosuke Hata, Shosuke Yamanouchi, Masayuki Hirose, Hidemitsu Kuwabara, Yasuharu Mizumoto, Yasuhiro Hagiuda
  • Insulating polyolefin laminate paper and method for producing same, and electric power supply cable
    Patent number: 4673607
    Abstract: An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: June 16, 1987
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Ryosuke Hata, Shosuke Yamanouchi, Masayuki Hirose, Hidemitsu Kuwabara, Yasuharu Mizumoto, Yasuhiro Hagiuda