Electric lamp and discharge devices – With gas or vapor – With particular gas or vapor
Reexamination Certificate
2005-01-18
2005-01-18
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
With particular gas or vapor
C313S639000, C313S638000
Reexamination Certificate
active
06844679
ABSTRACT:
The present invention provides a high-pressure discharge lamp100including a luminous bulb10enclosing at least a rare gas and halogen in the bulb and made substantially of quartz glass; and an electrode12made substantially of tungsten and disposed in the luminous bulb. The mole number of the halogen is larger than the sum of the total mole number of metal elements (except the tungsten element and the mercury element) that have the property of bonding to the halogen and are present in the luminous bulb10and the mole number of the tungsten present in the luminous bulb by evaporation from the electrode12during lamp operation.
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Horiuchi Makoto
Ichibakase Tsuyoshi
Kai Makoto
Kitahara Yoshiki
Mori Toshio
Guharay Karabi
Harness & Dickey & Pierce P.L.C.
Patel Nimeshkumar D.
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