Pressurized pen
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Oct 26, 2010
Grant Date -
Mar 5, 2009
app pub date -
Jun 30, 2008
filing date -
Aug 29, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Provided is a pressurized pen, which is enabled to enhance the sealing property of a compression chamber at a pressurizing time in the knocking operation of a knock mechanism and to improve the durability. A pressuring pump mechanism includes: a pressure member having a front end opening portion communicating with the inside of a medium containing tube and a compression chamber made extensible and contractible in axial direction; and a push member for coming in axial direction into and out of abutment against a rear end opening portion of the pressure member and for pushing the compression chamber of the pressure member in a gas-tight condition in a compressing direction. The push member is associated with the pushing action of a knock mechanism such that it is enabled to irrotationally move toward the rear end opening portion of the pressure member.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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TOMBOW PENCIL CO LTD | TOKYO 114-8583 |
International Classification(s)

- 2008 Application Filing Year
- B43K Class
- 124 Applications Filed
- 80 Patents Issued To-Date
- 64.52 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Taniguchi, Shunichi | Saitama, JP | 5 | 29 |
# of filed Patents : 5 Total Citations : 29 |
Cited Art Landscape
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Patent Citation Ranking
- 3 Citation Count
- B43K Class
- 2.27 % this patent is cited more than
- 15 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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