Eradicable inks
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United States of America Patent
Stats
-
Apr 24, 2001
Grant Date -
N/A
app pub date -
Apr 28, 1999
filing date -
Mar 25, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of changing the color of an ink mark includes applying an ink including a solvent and a triarylmethane dye dissolved in the solvent that changes color if contacted with a chemical agent to a substrate. The dye is soluble in phenyl cellosolve. A chemical agent is then applied to cause the dye to change color.
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Cited Art Landscape
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