Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2005-03-09
2009-06-09
Koslow, C. Melissa (Department: 1793)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C313S503000, C257S098000
Reexamination Certificate
active
07544310
ABSTRACT:
A green fluorescent substance of the invention is higher in luminance of green than a conventional rare-earth activated sialon fluorescent substance and more excellent in durability than a conventional oxide fluorescent substance. The fluorescent substance is obtained by solid-dissolving Eu into a nitride or oxy-nitride crystal having a β-type Si3N4crystal structure, and emits a fluorescent light having a peak within a range of 500 nm to 600 nm in wavelength by being irradiated with an excitation source.
REFERENCES:
patent: 7253446 (2007-08-01), Sakuma et al.
patent: 155047 (1985-09-01), None
patent: 60-206889 (1985-10-01), None
patent: 2003-124527 (2003-04-01), None
patent: 2003-336059 (2003-11-01), None
Kanesaka Manabu
Koslow C. Melissa
National Institute for Materials Science
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