Marking ink composition for writing board

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United States of America

PATENT NO 12168731
APP PUB NO 20210179872A1
SERIAL NO

17115977

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Abstract

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To provide a marking ink composition for a writing board having excellent erasability of drawn lines, the marking ink composition essentially containing a pigment, a pigment dispersant resin, a masking agent, and a modified polyvinylalcohol or a polyvinylalcohol having a degree of saponification from 40 to 84% by molar ratio.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI PENCIL COMPANY LIMITED5-23-37 HIGASHI-OHI SHINAGAWA-KU TOKYO 1408537 ?1408537

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mizoguchi, Tatsuya Shinagawa-ku, JP 4 5

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