Electric lamp and discharge devices – With gas or vapor – Envelope composition
Patent
1993-05-25
1994-09-27
Bell, Mark L.
Electric lamp and discharge devices
With gas or vapor
Envelope composition
313493, 501 64, 501 70, 501905, H01J 502, C03C 3095, C03C 3087, C03C 408
Patent
active
053509722
ABSTRACT:
A UV absorbing soda-lime glass containing specific amounts of cerium oxide and iron oxide permits the use of significantly less CeO.sub.2 than is used in prior art glass. The amount of cerium oxide and iron oxide present is 0.02-0.07 wt. % and 0.02-0.06 wt. %, respectively, with a combined total typically no more than 0.13 wt. %. This glass is useful for fluorescent lamp envelopes in absorbing UVB radiation having a wavelength between 280-320 nm, while being transparent to visible light radiation without effecting the color of the light emitted by the lamp.
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Bucher Gerald L.
Hammer Edward E.
Scott Curtis E.
Soules Thomas F.
Welker Christopher H.
Bell Mark L.
Corwin Stanley C.
General Electric Company
Hawranko George E.
Sample David R.
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