Patents by Inventor Tsutomu Futagami

Tsutomu Futagami 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).

  • Glass for fluorescent lamp, glass tube for fluorescent lamp, and fluorescent lamp
    Patent number: 7026753
    Abstract: The present invention provides glass for a fluorescent lamp, comprising: CeO2 of 0.1% to 1.0%, Sb2O3 of 0.05% or lower, SiO2 of 60% to 75%, Al2O3 of 0.5% to 10%, B2O3 of 0% to 5%, CaO of 0% to 8%, MgO of 0% to 8%, SrO of 0% to 15%, BaO of 1% to 12%, R2O of 13% to 22% (R represents Li, Na or K), Fe2O3 of 0% to 0.2%, TiO2 of 0% to 1.0%, and PbO of 0.05% or lower, the percent each being by mass; a glass tube for a fluorescent lamp comprises the above glass; and a fluorescent lamp comprises the above glass tube as an envelope.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: April 11, 2006
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Tsutomu Futagami, Yukio Takagi
  • Glass for fluorescent lamp, glass tube for fluorescent lamp, and fluorescent lamp
    Publication number: 20020074930
    Abstract: The present invention provides glass for a fluorescent lamp, comprising: CeO2 of 0.1% to 1.0%, Sb2O3 of 0.05% or lower, SiO2 of 60% to 75%, Al2O3 of 0.5% to 10%, B2O3 of 0% to 5%, CaO of 0% to 8%, MgO of 0% to 8%, SrO of 0% to 15%, BaO of 1% to 12%, R2O of 13% to 22% (R represents Li, Na or K), Fe2O3 of 0% to 0.2%, TiO2 of 0% to 1.0%, and PbO of 0.05% or lower, the percent each being by mass; a glass tube for a fluorescent lamp comprises the above glass; and a fluorescent lamp comprises the above glass tube as an envelope.
    Type: Application
    Filed: October 26, 2001
    Publication date: June 20, 2002
    Inventors: Tsutomu Futagami, Yukio Takagi