Plug for cold drawing and method for manufacturing of metal pipe

United States of America Patent

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Dec 13, 2011
Grant Date
Jul 8, 2010
app pub date
Jan 21, 2010
filing date
Aug 10, 2007

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Abstract

Therefore, the cold drawing plug according to the present invention can reduce the tensile residual stress on the outer surface of a metal pipe after the cold drawing.

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Patent Owner(s)

Patent Owner	Address
NIPPON STEEL CORPORATION	CHIYODA-KU TOKYO 100-8071

International Classification(s)

B21C:MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PR....

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Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Kawakami, Tadashi	Osaka, JP	15	35
Kuroda, Kouichi	Osaka, JP	33	759
Okui, Tatsuya	Osaka, JP	9	29

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Plug for cold drawing and method for manufacturing of metal pipe

Number of patents in Portfolio can not be more than 2000

United States of America Patent

12691503

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PATENT NO	8074482
APP PUB NO	20100170316A1
SERIAL NO	12691503
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
December 13, 2011	US,8074482,B2 US8074482B2	GRANTED PATENT AS SECOND PUBLICATION
July 08, 2010	US,20100170316,A1 US20100170316A1	FIRST PUBLISHED PATENT APPLICATION

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12691503

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