Phosphorescent writing system
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United States of America Patent
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-
N/A
Issued Date -
Apr 22, 2004
app pub date -
Jan 9, 2003
filing date -
Feb 21, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A writing surface has a phosphorescent or fluorescent material thereon that has an excitation energy that is less than the photon energy emitting from a penlight stylus light source or emitted through a transparent writing surface. The phosphor security ink is selectively excited only where exposed to light emission from the stylus thereby creating a phosphorescent or fluorescent glow visible under low ambient light conditions. The phosphorescent material is adhered to the writing surface or decorates a ferrite particulate which is drawn onto the writing surface through the influence of a magnet.
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Cited Art Landscape
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