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United States of America Patent
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-
Jan 26, 1993
Grant Date -
N/A
app pub date -
Aug 7, 1990
filing date -
Aug 8, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fluorescent tube (2) is made of a plastics material containing at least one organic fluorescent dye and attached to the inner surface of this tube is a barrier layer (3) for absorbing ultraviolet radiation, and attached to the inner surface of the layer (3) there is a phosphor layer (3a).
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