Writing instrument

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9375972
APP PUB NO 20150298488A1
SERIAL NO

14380951

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A writing instrument includes a pen point retaining member, a pen point that is attached to a first end of the pen point retaining member, an ink tank that is attached to a second end of the pen point retaining member, and an ink that is accommodated in the ink tank. The ink includes a lubricating interface layer-forming compound, and a carbonaceous film is formed on at least one of a surface of the ball or a contact portion of the ball holding portion with the ball.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA PILOT CORPORATIONTOKYO JAPAN TOKYO METROPOLIS

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Masuda, Hirotaka Kanagawa-ken, JP 5 27
Masushige, Naoto Aichi-ken, JP 6 4

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11.5 Year Payment $7400.00 $3700.00 $1850.00 Dec 28, 2027
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