Electric lamp and discharge devices – With gas or vapor – With particular gas or vapor
Reexamination Certificate
2007-06-19
2007-06-19
Santiago, Mariceli (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
With particular gas or vapor
C313S638000, C313S640000
Reexamination Certificate
active
10963215
ABSTRACT:
A metal halide lamp comprises a refractory, light-transmitting airtight container defining therein a discharge space with an internal volume of not more than 0.1 cc, electrodes sealed in the container, opposing each other with a distance of not more than 5 mm interposed, and a discharge medium sealed in the container and including a metal halide material and a rare gas. The metal halide includes first and second halide materials. The first halide material contains scandium (Sc) and sodium (Na) halides. The second halide material contains at least one of indium (In) and zinc (Zn) halides. The discharge medium contains substantially no mercury. The load on the wall of the container in a stable state is 50 W/cm2or more. A/B≦0.21 where A represents the intensity of an impurity chromium (Cr) spectrum in lighting spectra, and B represents the intensity of a scandium (Sc) spectrum.
REFERENCES:
patent: 6353289 (2002-03-01), Ishigami et al.
patent: 2002/0158580 (2002-10-01), Uemura et al.
patent: 1154455 (2001-11-01), None
patent: 1339090 (2003-08-01), None
patent: 11238488 (1999-08-01), None
Feb. 2, 2005 official Communication and European Search Report in connection with corresponding European Patent Appl. No. EP 04 25 6942 (Exhibit B).
Kawashima Hiromichi
Uemura Kozo
Cooper & Dunham LLP
Harison Toshiba Lighting Corp.
Santiago Mariceli
White John P.
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