Glass, method for its production, and FED device

Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube

Reexamination Certificate

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Details

C501S055000, C501S064000, C501S072000, C501S073000

Reexamination Certificate

active

06940220

ABSTRACT:
Glass comprises essentially 20-70% SiO2, 10-50% TiO2+Nb2O5+SnO2+Ta2O5+WO3+CeO2, 0-50% MgO+CaO+SrO+BaO+ZnO, and 0-30% B2O3+Al2O3, in molar percentage terms based on the oxides; and has a resistivity of at most 1015Ω·cm at 20° C. A method for production of glass is to produce the glass under such a condition that a redox represented by [Fe2+]/([Fe2+]+[Fe3+]) where Fe is present in the glass, is at least 0.6.

REFERENCES:
patent: 4612295 (1986-09-01), Sagara
patent: 28 09 409 (1978-09-01), None
patent: 50-53413 (1975-05-01), None
patent: 53-109514 (1978-09-01), None
patent: 60-21828 (1985-02-01), None
patent: 7-230776 (1995-08-01), None
patent: 9-197453 (1997-07-01), None
patent: 2003-77409 (2003-03-01), None

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