Glass funnel for cathode ray tube, and cathode ray tube

Details Glass funnel for cathode ray tube, and cathode ray tube Glass funnel for cathode ray tube, and cathode ray tube

2006-08-15

2006-08-15

Lorengo, J. A. (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S062000

Reexamination Certificate

active

07091143

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 portion3contains at least Na2O and K2O, the conductivity of said glass at the strain point is at least 4×10−6S/cm, the conductivity at 150° C. is at most 5×10−12S/cm, and a compressive stress layer is formed by a chemical strengthening method on at least part of the outer surface of the body portion3.

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