Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Reexamination Certificate
2011-06-21
2011-06-21
Talbot, Brian K (Department: 1715)
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
C427S067000, C427S068000, C427S069000
Reexamination Certificate
active
07964235
ABSTRACT:
The present invention is a ceramic discharge vessel for use in high-intensity-discharge (HID) lamps. The discharge vessel has a ceramic body and at least one seal region comprised of an aluminum oxynitride material. The seal region further has a surface layer for contacting a frit material wherein the surface layer is less reactive than the aluminum oxynitride material with respect to the molten frit during sealing. Preferably, the surface layer has a lower nitrogen content than the aluminum oxynitride material. The less reactive surface acts to minimize the formation of bubbles in the sealing frit during the sealing operation.
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Mackel Harry S.
Wei George C.
Clark Robert F.
Osram Sylvania Inc.
Talbot Brian K
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