Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2005-01-07
2010-11-09
Yee, Deborah (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S580000, C148S585000, C148S645000, C148S646000
Reexamination Certificate
active
07828917
ABSTRACT:
A rail manufacturing method is provided, in which a billet is hot-rolled into a rail form and the rail is cooled to ambient temperature. The foot part of the rail can be mechanically restrained to improve the straightness of the rail during at least the period of cooling where the surface temperature is between 800° C. and 400° C. In the subsequent cooling process, at least while the surface temperature of the foot of the rail is between 400° C. and 250° C., the rail is kept in an upright state, and cooled naturally without using insulation or accelerated cooling.
REFERENCES:
patent: 1456944 (1923-05-01), Stenbol
patent: 3276924 (1966-10-01), Okamoto et al.
patent: 6224694 (2001-05-01), Prskawetz et al.
patent: 6432230 (2002-08-01), Kock et al.
patent: 55002768 (1980-01-01), None
patent: 59031824 (1984-02-01), None
patent: 60251221 (1985-12-01), None
patent: 62013528 (1987-01-01), None
patent: 63-114923 (1988-05-01), None
patent: 03-166318 (1991-07-01), None
patent: 05076921 (1993-03-01), None
patent: 08295938 (1996-11-01), None
patent: 09168814 (1997-06-01), None
patent: 10130730 (1998-05-01), None
patent: 2003-129182 (2003-05-01), None
patent: 2003160813 (2003-06-01), None
patent: 2003-207319 (2003-07-01), None
patent: 2101369 (1995-07-01), None
patent: 2128718 (1999-04-01), None
Human—English translation of Japanese patent 59-031824, Gishi Takao et al., Feb. 21, 1984.
Notice of Allowance issued Dec. 28, 2007, for corresponding Russian Patent Application No. 2006125717 and English—language translation thereof.
Fujita Kazuo
Kobayashi Akira
Onodera Noriaki
Satoh Takuya
Ueda Masaharu
Dorsey & Whitney LLP
Nippon Steel Corporation
Yee Deborah
LandOfFree
Rail manufacturing method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rail manufacturing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rail manufacturing method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4241297