Erasable ink composition containing a graft-polymerized dye
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United States of America Patent
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May 26, 1998
Issued Date -
N/A
app pub date -
Jun 4, 1996
filing date -
Dec 21, 1994
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Expired
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Abstract
An erasable ink composition contains a water-insoluble polymeric dye obtained by the graft polymerization of a preformed water-insoluble polymer with a dye monomer possessing at least one ethylenically unsaturated site. The ink is intended for use in any of a variety of marking instruments, in particular, a ball-point pen.
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