Patents by Inventor Keiko Albessard

Keiko Albessard 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).

  • 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
  • Fluorescent lamp
    Patent number: 5811924
    Abstract: A phosphor film structure comprising a substrate and a phosphor film formed on the substrate, wherein the phosphor film comprises ultrafine phosphor particles having an average diameter of 200 nm or less, and obtained by heating a phosphor material to vaporize and rapidly quenching to solidify, and a haze of the phosphor film to a luminous flux of 380-760 nm in wavelength is 50% or less.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: September 22, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Miwa Okumura, Naotoshi Matsuda, Keiko Albessard, Masaaki Tamatani, Fusayoshi Kido, Iwao Mitsuishi
  • Phosphor, cathode-ray tube, fluorescent lamp and radiation intensifying screen
    Patent number: 5808409
    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 or less in an amount of 5 wt % or less.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: September 15, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naotoshi Matsuda, Masaaki Tamatani, Keiko Albessard, Miwa Okumura, Takeshi Takahara, Takeo Itou
  • Phosphor, cathode-ray tube, fluorescent lamp and radiation intensifying screen
    Patent number: 5644193
    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 or less in an amount of 5 wt % or less.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: July 1, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naotoshi Matsuda, Masaaki Tamatani, Keiko Albessard, Miwa Okumura, Takeshi Takahara, Takeo Itou