Patents by Inventor Youichiro Mitsuyuki

Youichiro Mitsuyuki 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).

  • Metal halide lamp maintaining a high lumen maintenance factor over an extended operation period
    Patent number: 5136208
    Abstract: A prescribed amount of tin halide is sealed in the arc tube of a metal halide lamp wherein a given amount of metal halide including a target amount of halogen and at least a predetermined amount of rare earth metal is sealed in the arc tube thereof to maintain a high lumen maintenance factor for an extended operation period. The prescribed amount of tin halide is preferably within 4.6.about.234 mol % of the predetermined amount of rare earth metal.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: August 4, 1992
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Hiromichi Kawashima, Kazuo Honda, Youichiro Mitsuyuki, Yasuki Mori, Masakazu Shibuya, Mamoru Furuya
  • Lamp for generating ultraviolet radiation
    Patent number: 4835442
    Abstract: A high-efficacy, high power ultraviolet radiation lamp is disclosed. Electrodes are respectively provided at two ends of a discharge tube, and at least a rare gas is sealed in the discharge tube. The discharge tube is curved in a U shape. A reservoir for reserving a radiant material for radiating ultraviolet rays projects from the discharge tube. An isolating section is provided to surround at least the reservoir. The isolating section adjusts the temperature of the reservoir and supplies an appropriate amount of radiant material into the discharge tube.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: May 30, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takahiro Sugimoto, Hiroki Sasaki, Akihiro Yonezawa, Youichiro Mitsuyuki