Patents Assigned to CIRCLE FOR PROMOTION OF SCI. & ENG.
  • Glass funnel for cathode ray tube, and cathode ray tube
    Publication number: 20050052135
    Abstract: A glass funnel suitable for a chemical strengthening method of an electric field application type without impairing the safety of a cathode ray tube. A glass funnel for a cathode ray tube, characterized in that glass at a body portion 3 contains at least Na2O and K2O, the conductivity of said glass at the strain point is at least 4×10?6 S/cm, the conductivity at 150° C. is at most 5×10?12 S/cm, and a compressive stress layer is formed by a chemical strengthening method on at least part of the outer surface of the body portion 3.
    Type: Application
    Filed: September 7, 2004
    Publication date: March 10, 2005
    Applicants: ASAHI GLASS COMPANY LIMITED, CIRCLE FOR PROMOTION OF SCI. & ENG.
    Inventors: Shuichi Shibata, Tetsuji Yano, Jaeho Lee, Yuichi Kuroki, Mikio Ueki