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US 6,605,143 B2Granted
Water based ink composition for writing instrument
AssigneeMitsubishi Pencil Company, Limited
InventorsYoji Takeuchi, Shigeru Miyazaki
Life of this patent
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Abstract
A water based ink composition for a writing instrument containing an N-acylglutamic acid ester and further containing a colorant, a perfume and water, which is less liable to cause feathering of the lines and in which a perfume is dispersed and retained in an aqueous medium in a stable state and the fragrance lasts long.
Claims7
A water based ink composition for a writing instrument containing an N-acylglutamic acid ester and further containing a colorant, a perfume and water.
Dependencies are inferred from the claim text.