Patents Examined by Macli Haynes
  • Phosphor, cathode-ray tube, fluorescent lamp and radiation intensifying screen
    Patent number: 5814932
    Abstract: Disclosed is a phosphor suitable for use in a cathode-ray tube, a fluorescent lamp, a radiation intensifying screen, which comprises transparent spherical particles having an average particle size of 0.5 to 20 .mu.m and a ratio of the major diameter to the minor diameter of individual particles in the range of 1.0 to 1.5, and ultrafine particles having a diameter of 0.2 .mu.m less in an amount of 5 wt % or less.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: September 29, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naotoshi Matsuda, Masaaki Tamatani, Keiko Albessard, Miwa Okumura, Takeshi Takahara, Takeo Itou