Patents by Inventor Kenji Ushikoshi

Kenji Ushikoshi 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).

  • Copper-based catalyst and method for production thereof
    Patent number: 6048820
    Abstract: The invention relates to a copper-based catalyst with high activity and a long catalyst life and to a method of producing the catalyst. This catalyst essentially comprises copper oxide, zinc oxide, aluminum oxide, and silicon oxide and optionally containing zirconium oxide, gallium oxide, and palladium oxide, wherein with the total weight of the catalyst being taken as 100%, the above oxides account for, in the order mentioned, 20-60 weight %, 10-50 weight %, 2-10 weight %, 0.3-0.9 weight %, 0-40 weight %, 0-10 weight %, and 0-10 weight %, respectively, and the silicon oxide mentioned above has been derived from colloidal silica or dissolved silica in water, which catalyst has been subjected to calcination at 480-690.degree. C.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: April 11, 2000
    Assignees: Agency of Industrial of Sciences and Technology, The Reseach Institute of Innovative Technology for the Earth
    Inventors: Masami Takeuchi, Hirotaka Mabuse, Taiki Watanabe, Michiaki Umeno, Takashi Matsuda, Kozo Mori, Kenji Ushikoshi, Jamil Toyir, Shengcheng Luo, Jingang Wu, Masahiro Saito
  • Silicon carbide fiber and method of manufacturing the same
    Patent number: 5344709
    Abstract: A silicon carbide fiber having low specific electric resistance and excellent mechanical properties and a method for manufacturing the fiber.The silicon carbide fiber is characterized in that an amorphous carbon film is formed on the surface thereof. The fiber is manufactured by heating an antimelt-treated polycarbosilane fiber at a temperature not exceeding 1000.degree. C. in an inert gas atmosphere followed by heating at a temperature of greater than 1000.degree. C. and up to 1500.degree. C. in an atmosphere of a mixture of hydrocarbon gas and inert gas.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: September 6, 1994
    Assignee: Nippon Carbon Co., Ltd.
    Inventors: Atsuya Tokutomi, Hiroshi Ichikawa, Kenji Ushikoshi, Hiroshi Yamauchi
  • Electromagnetic wave absorbers of silicon carbide fibers
    Patent number: 4726980
    Abstract: An electromagnetic wave absorber comprising a surface layer made of a composite of fibers having an electrical specific resistance of more than 10.sup.4 .OMEGA.cm and a resin, and a wave absorbing layer made of a composite containing silicon carbide fibers having an electrical specific resistance of from 10.sup.-2 to 10.sup.4 .OMEGA.cm. The composite used in the surface layer may be prepared, for example, by impregnating the resin in between the fibers after they have been treated to be a woven cloth, mat or felt or unidirectionally arranged fibers. If a wave absorbing layer is to be made of a composite containing the silicon carbide fibers and a resin, then the composite may be prepared in the same way as above.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: February 23, 1988
    Assignee: Nippon Carbon Co., Ltd.
    Inventors: Toshikatsu Ishikawa, Haruo Teranishi, Hiroshi Ichikawa, Kenji Ushikoshi