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US 4,071,465 AGranted
Deep-red emitting phosphor
AssigneeWestinghouse Electric Corp.
InventorFrank M. Vodoklys
Life of this patent
Estimating the term…
Abstract
A luminescent composition excited by ultraviolet or selected visible wavelength radiations consisting essentially of aluminum oxide-germanium dioxide matrix activated by chromium. The composition provides strong line emissions in the deep red.
Claims3
A luminescent composition which can be excited to luminescence by ultraviolet or by visible wavelength radiations of deep violet or green to emit in the deep red, said composition consisting essentially of Al.sub.2 O.sub.3.sup.. xGeO.sub.2 :yCr, wherein "x" is from about 0.012 to about 0.20 and "y" is from about 0.006 to about 0.035.
Dependencies are inferred from the claim text.