Electric lamp and discharge devices – Having heating means to control gas/vapor – gas or vapor... – Discharge device gettering
Reexamination Certificate
2003-12-03
2008-11-11
Patel, Nimeshkumar (Department: 2879)
Electric lamp and discharge devices
Having heating means to control gas/vapor, gas or vapor...
Discharge device gettering
C313S547000, C313S553000, C313S562000, C313S489000
Reexamination Certificate
active
07449835
ABSTRACT:
An electric lamp is provided having a luminescent layer on the lamp envelope that produces visible light when impinged by ultraviolet radiation generated within the lamp. An undercoat for the electric lamp increases the luminous efficacy of the lamp. The undercoat includes a particulate non-fluorescent material derived from a sintered mixture of an aluminum oxide material with a contiguous layer of getter material which reacts with contaminants present in the lamp. The getter material is an alkaline earth metal borate material or mixtures thereof.
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Hollweg Thomas A
Koninklijke Philips Electronics
Patel Nimeshkumar
LandOfFree
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