Electric lamp and discharge devices – With gas or vapor – With particular gas or vapor
Reexamination Certificate
2005-01-11
2005-01-11
Williams, Joseph (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
With particular gas or vapor
C313S641000, C313S642000, C313S643000, C313S639000
Reexamination Certificate
active
06841938
ABSTRACT:
Metal halide lamps have a discharge vessel operable at a high coldest spot temperature. The discharge vessel encloses a discharge space comprising an ionizable gas filling and, in addition to Hg, also an alkali iodide of Na of Li or a combination of both. According to the invention, the filling also comprises TbI3 or GdI3 or a combination thereof.
REFERENCES:
patent: 5861714 (1999-01-01), Wei et al.
patent: 5973453 (1999-10-01), Van Vliet et al.
patent: 6137230 (2000-10-01), Born et al.
patent: 6362571 (2002-03-01), Suijker et al.
patent: 0377899 (1989-12-01), None
JP 10312771, “Discharge lamp and Image Projector Using Thereof”, Feb. 1999, vol. 1999, No. 2, (Abstract).
JP 51086281A, Derwent Publication Ltd., An 1976-6946OX, XP002166172, (Abstract).
Duisters Antonius Arnoldus
Hendricx Josephus Christiaan Maria
Suijker Joseph Leonardus Gregorius
Vermeulen Fransiscus Arnoldus
Koninklijke Philips Electronics , N.V.
Perry Anthony
Williams Joseph
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