Electric lamp and discharge devices – With gas or vapor – Envelope composition
Reexamination Certificate
2005-06-24
2008-09-02
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Envelope composition
C501S152000, C252S584000, C252S586000
Reexamination Certificate
active
07420331
ABSTRACT:
A ceramic discharge vessel is provided wherein the vessel comprises a hollow body for enclosing a discharge and the hollow body is made of a polycrystalline dysprosium oxide containing a luminescent dopant that emits one or more visible light wavelengths when stimulated by radiation generated by the discharge. Preferably, the polycrystalline dysprosium oxide has been doped with one or more of europium, cerium, or terbium in an amount from about 0.1 to about 10 percent by weight on an oxide basis.
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Browne Joanne M.
Lapatovich Walter P.
Mishra Kailash C.
Raukas Madis
Wei George C.
Clark Robert F.
Hines Anne M
Osram Sylvania Inc.
Patel Nimeshkumar D.
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