Pen and pen refill

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11472220
APP PUB NO 20210138824A1
SERIAL NO

17058175

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A pen includes: an ink reservoir configured to store an ink; and a pen tip section including an ink application part configured to apply the ink to an ink application object. The ink application part of the pen tip section includes: a rigid tip made of a rigid material and having a hemispherical outer surface, an inner surface facing toward the ink reservoir, and a penetration part penetrating from the inner surface side to the outer surface side of the rigid tip; and at least one foam body filled in the penetration part at least on the side of the penetration part close to the outer surface side of the rigid tip, and provided with at least one air bubble formed to communicate from the outer surface side of the foam body to the inner surface side of the foam body.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
KURETAKE CO LTD576 MINAMIKYOBATE-CHO 7-CHOME NARA-SHI NARA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Morimoto, Makiko Nara, JP 7 5
Nishitani, Ichiro Nara, JP 9 58

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Maintenance Fees

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3.5 Year Payment $1600.00 $800.00 $400.00 Apr 18, 2026
7.5 Year Payment $3600.00 $1800.00 $900.00 Apr 18, 2030
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Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00