Glass composition for lamp, lamp, backlight unit and method...

Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...

Reexamination Certificate

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C501S065000, C501S066000, C501S067000, C501S068000, C501S069000, C501S070000, C501S072000

Reexamination Certificate

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07977262

ABSTRACT:
A glass composition which contains Ce ions as a component substantially comprises, in terms of oxides, SiO2: 55 to 75 wt %, B2O3: 6 to 25 wt %, CeO2: 0.01 to 5 wt %, SnO: 0.01 to 5 wt %, Al2O3: 0 to 10 wt %, Li2O: 0 to 10 wt %, Na2O: 0 to 10 wt %, K2O: 0 to 10 wt %, MgO: 0 to 5 wt %, CaO: 0 to 10 wt %, SrO: 0 to 10 wt %, BaO 0 to 10 wt %, TiO2: 0 to 1.0 wt %, Fe2O3: 0.01 to 0.2 wt %, Sb2O3: 0 to 5 wt %, ZrO2: 0.01 to 5 wt %. By having such constituents, the glass composition is capable of suppressing transmission of ultraviolet light and solarization, and thus the glass composition hardly suffers from initial coloring or coloring during lamp production.

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