Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1990-01-22
1991-09-24
Beck, Shrive
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
427 64, 427 67, 427 68, 427213, 427215, 4271264, 4272553, 4274192, 4274193, B05D 506, B05D 512, B05D 700
Patent
active
050512773
ABSTRACT:
The method of making a bi-layer coating on phosphor particles is disclosed. The first layer surrounding the phosphor is silica. The second layer surrounding the phosphor is alumina. The bi-layer phosphor is useful in fluorescent lamps providing improved maintenance and brightness. The bi-layer phosphor can also be used in high color rendition lamps employing blends of phosphors.
REFERENCES:
patent: 3408223 (1968-10-01), Shortes
patent: 4585673 (1986-04-01), Sigai
patent: 4691140 (1987-09-01), Sakakibara et al.
patent: 4710674 (1987-12-01), Sigai
patent: 4803400 (1989-02-01), Peters et al.
patent: 4877651 (1989-10-01), Dory
Klinedinst Keith A.
Sigai A. Gary
Beck Shrive
GTE Laboratories Incorporated
King Roy V.
Ruoff Carl F.
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