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US 4,728,459 AGranted
Tungsten-containing zinc silicate phosphor
AssigneeGTE Products Corporation
InventorsAlbert K. Fan, Vincent Chiola
Life of this patent
Estimating the term…
Abstract
A manganese-activated zinc silicate phosphor contains a small amount of tungsten dispersed throughout the phosphor matrix. The tungsten improves maintenance of a fluorescent lamp in which the phosphor is used.
Claims3
A manganese-activated zinc silicate phosphor containing tungsten dispersed throughout the phosphor matrix.
A manganese-activated zinc silicate phosphor containing tungsten dispersed throughout the phosphor matrix, the amount of tungsten being sufficient to improve lamp maintenance of a fluorescent lamp in which the phosphor is used.
Dependencies are inferred from the claim text.