Patents by Inventor Hisayo Uetake

Hisayo Uetake 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).

  • Luminescent material
    Patent number: 7635438
    Abstract: A europium-activated alkaline earth orthosilicate luminescent material is provided, which includes a compound having a composition represented by a following formula 1: (SrxBayCazEuw)2SiO4??formula 1 wherein, x, y, z and w satisfy following relational expressions 2, and 4 to 7, and are values satisfying the expression 3 when a, b, c and d are assumed to be 573, 467, 623 and 736, respectively: x+y+z+w=1??expression 2 600?ax+by+cz+dw??expression 3 0?x/(1?w)?0.95??expression 4 0?y/(1?w)?0.4??expression 5 0<z/(1?w)?0.95??expression 6 0.02?w?0.2??expression 7 the luminescent material shows an emission band having a peak wavelength of 600 nm or more when the luminescent material is excited by ultraviolet radiation having a wavelength of 254 nm.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: December 22, 2009
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Lighting & Technology Corporation
    Inventors: Masaaki Tamatani, Hisayo Uetake, Ryosuke Hiramatsu, Kazuaki Ootsuka, Yasushi Hattori, Naomi Shida
  • FLUORESCENT SUBSTANCE CONTAINING NITROGEN, METHOD FOR MANUFACTURING THE SAME, AND LIGHT-EMITTING DEVICE
    Publication number: 20080253952
    Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.
    Type: Application
    Filed: June 20, 2008
    Publication date: October 16, 2008
    Inventors: Ryosuke Hiramatsu, Kazuaki Ootsuka, Naomi Shida, Masaaki Tamatani, Hisayo Uetake, Yoshihito Tsutsui
  • Fluorescent substance containing nitrogen, method for manufacturing the same, and light-emitting device
    Patent number: 7414272
    Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: August 19, 2008
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd., Toshiba Lighting & Technology Corporation
    Inventors: Ryosuke Hiramatsu, Kazuaki Ootsuka, Naomi Shida, Masaaki Tamatani, Hisayo Uetake, Yoshihito Tsutsui
  • LUMINESCENT MATERIAL
    Publication number: 20080017831
    Abstract: A europium-activated alkaline earth orthosilicate luminescent material is provided, which includes a compound having a composition represented by a following formula 1: (Srx Bay Caz Euw)2SiO4??formula 1 wherein, x, y, z and w satisfy following relational expressions 2, and 4 to 7, and are values satisfying the expression 3 when a, b, c and d are assumed to be 573, 467, 623 and 736, respectively: x+y+z+w=1??expression 2 600?ax+by+cz+dw??expression 3 0?x/(1?w)?0.95??expression 4 0?y/(1?w)?0.4??expression 5 0<z/(1?w)?0.95??expression 6 0.02?w?0.2??expression 7 the luminescent material shows an emission band having a peak wavelength of 600 nm or more when the luminescent material is excited by ultraviolet radiation having a wavelength of 254 nm.
    Type: Application
    Filed: July 18, 2007
    Publication date: January 24, 2008
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Masaaki Tamatani, Hisayo Uetake, Ryosuke Hiramatsu, Kazuaki Ootsuka, Yasushi Hattori, Naomi Shida
  • Fluorescent substance containing nitrogen, method for manufacturing the same, and light-emitting device
    Publication number: 20060011936
    Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.
    Type: Application
    Filed: July 13, 2005
    Publication date: January 19, 2006
    Inventors: Ryosuke Hiramatsu, Kazuaki Ootsuka, Naomi Shida, Masaaki Tamatani, Hisayo Uetake, Yoshihito Tsutsui