Patents Assigned to Fukuoka Tokushu Garasu Kabushiki Kaisha
  • High refractive index glass compositions
    Patent number: 4082427
    Abstract: Disclosed are glass compositions that are particularly suited for making colorless and transparent reflex-reflective glass beads with refractive indices over 2.15. These lead-free glass compositions are made with TiO.sub.2 as the main constituent mixed with alkaline earth oxides and alkaline metal oxides, etc.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: April 4, 1978
    Assignee: Fukuoka Tokushu Garasu Kabushiki Kaisha
    Inventor: Nobuyuki Nakashima