Marking pen

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11987068
APP PUB NO 20230086315A1
SERIAL NO

17759387

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A marking pen, comprising: a shaft cylinder; a porous pen core accommodated in the shaft cylinder, and configured to project from, and retract into, an opening part provided at a tip end of the shaft cylinder; an inner cotton accommodated in the shaft cylinder, and filled with an aqueous ink composition to be fed to the pen core, the aqueous ink composition including a water soluble organic solvent in an amount of from 20 mass % to 60 mass %; and a delivery mechanism configured to cause a tip end of the pen core to project from, and retract into, the opening part.

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First Claim

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Patent Owner(s)

  • MITSUBISHI PENCIL COMPANY, LIMITED

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirayama, Akiko Shinagawa-ku, JP 9 0
Kobayashi, Yusuke Shinagawa-ku, JP 190 741
Nakajima, Toru Shinagawa-ku, JP 23 95
Takada, Koji Shinagawa-ku, JP 17 148

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