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US 6,471,759 B2Granted
Water based ink composition for writing instrument
AssigneeMitsubishi Pencil Company, Limited
InventorsMasaru Miyamoto, Tadashi Kamagata
Life of this patent
Estimating the term…
Abstract
A water based ink composition for a writing instrument containing a lecithin derivative 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.
Claims1
A water based ink composition for a writing instrument containing a lecithin derivative and further containing a colorant, a perfume and water.
Dependencies are inferred from the claim text.