Lead and arsenic free borosilicate glass and lamp containing sam

Details Lead and arsenic free borosilicate glass and lamp containing sam Lead and arsenic free borosilicate glass and lamp containing sam

1998-05-28

2000-09-12

Patel, Ashok

Electric lamp and discharge devices

With gas or vapor

Envelope composition

313 25, 501 64, 501 66, H01J 6130, C03C 3091

Patent

active

061182168

ABSTRACT:
A lead and arsenic free borosilicate glass is provided which is suitable for use in electric arc discharge lamps. The glass is tungsten-sealing and provides desirable protection from ultraviolet radiation. In addition, the glass is resistant to surface scum formation during melting and reduces the amount of batched iron which must be added for UVB protection.

REFERENCES:
patent: 3531677 (1970-09-01), Loughridge
patent: 3984252 (1976-10-01), Kiefer
patent: 4806268 (1989-02-01), Kiss et al.
patent: 4925814 (1990-05-01), Fine
patent: 5182237 (1993-01-01), Brix
patent: 5557171 (1996-09-01), Marlor et al.
patent: 5599753 (1997-02-01), Watzke et al.
patent: 5849649 (1998-12-01), Poole
JP 08 012369, Patent Abstracts of Japan, vol. 96, No. 5, (May 31, 1996).
Abstract, RU 2035414 C (May 20, 1995).

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