Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2006-04-04
2006-04-04
Koslow, C. Melissa (Department: 1755)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C252S30140H, C252S30140P, C313S487000
Reexamination Certificate
active
07022263
ABSTRACT:
Europium-activated phosphors comprise oxides of at least a rare-earth metal selected from the group consisting of gadolinium, yttrium, lanthanum, and combinations thereof and at least a Group-IIIB metal selected from the group consisting of aluminum, gallium, indium, and combinations thereof. A method for making such phosphors comprises adding at least a halide of at least one of the selected Group-IIIB metals in a starting mixture. The method further comprises firing the starting mixture in an oxygen-containing atmosphere. The phosphors produced by such a method exhibit improved absorption in the UV wavelength range and improved quantum efficiency.
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Derwent abstract for JP 57-10678.
Derwent abstract for JP 57-180687.
Derwent abstract for JP 61-12785.
Shigeo Shionaya and William M. Yet (Ed.), “Phosphor Handbook”, pp. 367-555, CRC Press, Boca Raton, FL (1994).
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Derwent Abstract for KR 2002003886 A, Aug. 9, 2002.
Comanzo Holly Ann
Setlur Anant Achyut
Srivastava Alok Mani
General Electric Company
Klindtworth Jason K.
Koslow C. Melissa
Testa Jean K.
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