Patents by Inventor Yoshifumi Tachi

Yoshifumi Tachi 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).

  • Dielectric resin foam and lens for radio waves using the same
    Patent number: 7179844
    Abstract: It is an object of the present invention to provide a dielectric resin foam which has high and uniform dielectric properties and is preferable for use as various dielectric materials. A dielectric resin foam obtained by expanding a resin composition comprising a synthetic resin and a fibrous and/or plate-like dielectric inorganic filler is provided.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: February 20, 2007
    Assignees: Otsuka Chemical Co., Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Minoru Aki, Hiroyuki Monde, Akira Tabuchi, Yoshifumi Tachi, Syougo Kawakami, Masatoshi Kuroda, Tetsuo Kishimoto, Kouichi Kimura
  • Dielectric resin foam and lens antenna comprising the same
    Publication number: 20040029985
    Abstract: It is an object of the present invention to provide a dielectric resin foam which has high and uniform dielectric properties and is preferable for use as various dielectric materials. A dielectric resin foam obtained by expanding a resin composition comprising a synthetic resin and a fibrous and/or plate-like dielectric inorganic filler is provided.
    Type: Application
    Filed: April 3, 2003
    Publication date: February 12, 2004
    Inventors: Minoru Aki, Hiroyuki Monde, Akira Tabuchi, Yoshifumi Tachi, Syougo Kawakami, Masatoshi Kuroda, Tetsuo Kishimoto, Kouichi Kimura
  • Blowing agent powder and process for producing the same
    Patent number: 6399201
    Abstract: A powder comprising a blowing agent powder core which is coated with at least one oil-like substance on its surface, and a process for producing a powder comprising a blowing agent powder core which is coated with at least one oil-like substance on its surface, comprising the following steps (a) and (b): (a) adding at least one oil-like substance in the form of a mist to a blowing agent powder; and (b) mixing the oil-like substance with the blowing agent powder under such mixing conditions that the blowing agent powder is less susceptible to pulverization.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: June 4, 2002
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Tsukasa Maekawa, Toshinori Takao, Sadafumi Shono, Chiaki Yasumaru, Shigeru Sumitomo, Nobuyuki Ueda, Yoshifumi Tachi
  • Substantially anhydrous foaming agent and process for producing the same
    Patent number: 6355698
    Abstract: It provides a blowing agent which is significantly inhibited from solidification and is exceedingly useful as a blowing agent satisfactory in flowability, dispersibility into resins, and the like, even after the lapse of a prolonged period of time, and a process for producing the same. The blowing agent of the present invention is substantially anhydrous blowing agent, and it is obtained by treating a blowing agent with a surface-treating agent capable of removing water from the blowing agent, followed by optionally heating during or after the treatment.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: March 12, 2002
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Tsukasa Maekawa, Nobuyuki Ueda, Sadafumi Shono, Yoshifumi Tachi, Shigeru Sumitomo
  • SUBSTANTIALLY ANHYDROUS BLOWING AGENT AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20020025988
    Abstract: It provides a blowing agent which is significantly inhibited from solidification and is exceedingly useful as a blowing agent satisfactory in flowability, dispersibility into resins, and the like, even after the lapse of a prolonged period of time, and a process for producing the same.
    Type: Application
    Filed: March 22, 2000
    Publication date: February 28, 2002
    Inventors: TSUKASA MAEKAWA, NOBUYUKI UEDA, SADAFUMI SHONO, YOSHIFUMI TACHI, SHIGERU SUMITOMO