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US 2014/0037362 A1Published application
Irreversible thermochromic ink compositions
AssigneeSanford, L.P.
InventorWing Sum V. Kwan
Life of this patent
Estimating the term…
Abstract
The disclosure is generally related to an irreversible thermochromic ink composition and, more particularly, to an irreversible thermochromic ink composition comprising a carrier and thermochromic capsules, the thermochromic capsules comprising a shell and a core, the core comprising an eradicable dye capable of becoming substantially colorless and/or of changing color from a first colored state to a second colored state when exposed to an eradicator.
Claims24
An irreversible thermochromic ink comprising:
- a carrier and thermochromic capsules dispersed in the carrier, the thermochromic capsules comprising a shell and a core, the core comprising an eradicable dye capable of becoming substantially colorless and/or of changing color from a first colored state to a second colored state.
A writing instrument comprising:
- a writing point in fluid communication with an ink reservoir, wherein the ink reservoir contains an irreversible thermochromic ink composition comprising a carrier and thermochromic capsules dispersed in the carrier, the thermochromic capsules comprising a shell and a core, the core comprising an eradicable dye capable of becoming substantially colorless and/or of changing color from a first colored state to a second colored state.
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A thermochromic capsule comprising:
- a thermochromic capsule comprising a shell and a core, the core comprising an eradicable dye capable of becoming substantially colorless and/or of changing color from a first colored state to a second colored state.
Dependencies are inferred from the claim text.