Patents by Inventor Izumi Ishikawa

Izumi Ishikawa 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).

  • SYSTEMS, DEVICES, AND METHODS FOR PASSIVE TRANSDERMAL DELIVERY OF ACTIVE AGENTS TO A BIOLOGICAL INTERFACE
    Publication number: 20080286349
    Abstract: Systems, devices, and methods for transdermal delivery of one or more therapeutic active agents to a biological interface. A transdermal drug delivery system is provided for passive transdermal delivery of one or more ionizable active agents to a biological interface of a subject. A transdermal drug delivery system includes a backing substrate, and an active agent layer. The active layer includes a thickening agent, a plasticizer, and a therapeutically effective amount of an ionizable active agent.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 20, 2008
    Inventors: Youhei Nomoto, Kiyoshi Kanamura, Izumi Ishikawa, Mayuko Ishida, Chizuko Ishikawa, Akiyoshi Saito
  • Polyethylene composition for use in insulations and joints of extra-high voltage power cables, and an extra-high voltage power cable and joint therefor employing this polyethylene composition
    Patent number: 5536777
    Abstract: A polyethylene composition which is useful in insulations and joints of extra-high voltage power cables, and in which a cross-linking agent, comprising an organic peroxide subjected to purification processing, and an antioxidant, are blended, wherein the cross-linked composition has a dielectric loss tangent (tan.delta.) of less than or equal to 0.07% at a temperature of 90.degree. C. and under an electric field stress of 20 kV/mm. This polyethylene composition exhibits little dielectric loss, even at high temperatures or high electric field stresses, and is optimally employed in insulations and joints for extra-high voltage power cables of 275 kV or more.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: July 16, 1996
    Assignees: Fujikura Ltd., NOF Corporation
    Inventors: Izumi Ishikawa, Hiroyuki Miyata, Thoru Nakatsuka, Kazuhiko Goto, Kenji Matsui, Shiro Nakayama, Tohru Takahashi, Mitutaka Tanida, Toshio Niwa
  • Electric insulated wire and cable using the same
    Patent number: 5521009
    Abstract: The present invention relates to an insulated wire comprising a conductor and at least two insulating layers provided on the outer periphery of the conductor. The inner insulating layer is provided directly or via another insulation on the outer periphery of the conductor and comprises a polyolefin compound containing 20 to 80 parts by weight of at least one substance selected from ethylene .alpha.-olefin copolymer, ethylene .alpha.-olefin polyene copolymer (.alpha.-olefin having the carbon numbers of C.sub.3 -C.sub.10, polyene being non-conjugated diene).
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: May 28, 1996
    Assignee: Fujikura Ltd.
    Inventors: Izumi Ishikawa, Isao Takahashi, Hideo Sunazuka, Akira Yoshino, Masatake Hasegawa, Motohisa Murayama
  • Electric insulated wire and cable using the same
    Patent number: 5358786
    Abstract: The present invention relates to an insulated wire comprising a conductor and at least two insulating layers provided on the outer periphery of the conductor. The inner insulating layer is provided directly or via another insulation on the outer periphery of the conductor and comprises a polyolefin compound containing 20 to 80 parts by weight of at least one substance selected from ethylene .alpha.-olefin copolymer, ethylene .alpha.-olefin polyene copolymer (.alpha.-olefin having the carbon numbers of C.sub.3 -C.sub.10, polyene being non-conjugated diene).
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: October 25, 1994
    Assignee: Fujikura Ltd.
    Inventors: Izumi Ishikawa, Isao Takahashi, Hideo Sunazuka, Akira Yoshino, Masatake Hasegawa, Motohisa Murayama