Patents by Inventor Seiko Komoda

Seiko Komoda 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).

  • Amalgam having extended stable mercury vapor pressure range and low mercury vapor pressure discharge lamp using the same
    Patent number: 4972118
    Abstract: An amalgam has a base metal including bismuth in an amount selected from the range between about 45 wt % and 65 wt %, and lead in an amount selected from the range between about 35 wt % and 55 wt %. The amalgam also includes mercury the amount of which is selected from the range between about 1 wt % and 12 wt % of the total amount of the amalgam. Such amalgam is sealed in a low mercury vapor pressure discharge lamp which operates at a medium bulb surface temperature to achieve a stable mercury vapor pressure over an extended amalgam temperature range.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: November 20, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Yorifuji, Seiko Komoda