CRAYON

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20090209678A1
SERIAL NO

12373139

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention provides a crayon having excellent feel when writing while having high gel hardness. The crayon comprises a colorant, a gelling agent, an organic solvent and a resin component, wherein the gelling agent is at least one selected from the group consisting of dibenzylidene sorbitol, tribenzylidene sorbitol and derivatives thereof, and the resin component comprises a combination of polyvinyl butyral resin having an average degree of polymerization of less than 350 and polyvinyl butyral resin having an average degree of polymerization of 350 or more.

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Patent Owner(s)

Patent OwnerAddress
SAKURA COLOR PRODUCTS CORPORATION10-17 NAKAMICHI 1-CHOME HIGASHINARI-KU OSAKA-SHI OSAKA 537-0025

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukuo, Hidetoshi Osaka , JP 21 145
Sumitomo, Kotaro Osaka , JP 8 15
Takahashi, Masamitsu Osaka , JP 61 769

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