Colored glass for lighting, colored glass bulb and method...

Details Colored glass for lighting, colored glass bulb and method... Colored glass for lighting, colored glass bulb and method...

2005-12-01

2009-06-02

Group, Karl E (Department: 1793)

Electric lamp and discharge devices

With gas or vapor

Envelope composition

C501S070000

Reexamination Certificate

active

07541742

ABSTRACT:
The present invention provides colored glass containing no hazardous substances, such as CdS, CdSe and PbCrO4, and used for lamps and covers for lighting, a colored glass bulb with yellow to orange color produced by using said colored glass, and a method for producing said colored glass and said colored glass bulb. Glass composition having a formula of R′2O—RO—SiO2(wherein R′ is an alkali metal element and R is an alkaline earth metal element) is added with 0.01-0.6 of weight ratio of Mo (molybdenum) as MoO3and 0.01-1.0 of weight ratio of S to obtain the colored glass and the colored glass bulb therefrom. The colored glass having a formula of R′2O—RO—SiO2is formed to a desired shape to obtain the colored glass bulb, and the shaped hollow article is heated to 400-620° C. to apply a coloring treatment thereto.

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European Search Report dated Nov. 30, 2001.

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