Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Reexamination Certificate
2004-04-30
2009-10-06
King, Roy (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C075S568000, C075S508000
Reexamination Certificate
active
07597737
ABSTRACT:
A method for producing a steel ingot, which comprises an Mg oxide forming step of preparing a molten steel containing Mg in an amount sufficient for the molten steel to have an oxide composition having MgO as a primary component and a dissociation step of keeping the pressure of the atmosphere around the molten steel to be lower than that in the Mg oxide forming step, to thereby dissociate MgO to Mg and oxygen and reduce the content of Mg in the steel to 50% or less of that in the Mg oxide forming step through the diffusion thereof into a gas phase. A preferred method further involves a solidifying step.
REFERENCES:
patent: 3235373 (1966-02-01), Perry et al.
patent: 3687187 (1972-08-01), Tommaney et al.
patent: 3764297 (1973-10-01), Coad et al.
patent: 4294611 (1981-10-01), Tamas et al.
patent: 4871511 (1989-10-01), Smith et al.
patent: 5133812 (1992-07-01), Kelly et al.
patent: 6358299 (2002-03-01), Wei
patent: 6585799 (2003-07-01), Zeze et al.
patent: 7445678 (2008-11-01), Mishima et al.
patent: 1165871 (1997-11-01), None
patent: 1 331 278 (2003-07-01), None
patent: 1 422 301 (2004-05-01), None
patent: 2 043 113 (1980-10-01), None
patent: 55-028384 (1980-02-01), None
patent: 55-091923 (1980-07-01), None
patent: 04-002745 (1992-01-01), None
patent: 05-186813 (1993-07-01), None
patent: 05-186813 (1993-07-01), None
patent: 05186813 (1993-07-01), None
patent: 11-293407 (1999-10-01), None
patent: 11-293407 (1999-10-01), None
patent: 2000-297353 (2000-10-01), None
patent: 2001-214212 (2001-08-01), None
patent: 2002-161309 (2002-06-01), None
patent: 2002-161309 (2002-06-01), None
patent: 2003-183765 (2003-07-01), None
patent: 2003-183765 (2003-07-01), None
Machine translation of JP 05-186813 A, Jul. 1993.
Machine translation of JP 05-186813 A published Jul. 1993.
International Preliminary Report on Patent Ability issued in PCT/JP2004/006287; dated Apr. 20, and Jul. 6, 2006.
Fujita Etsuo
Hara Ken-ichiro
Mishima Setsuo
Takao Hidemi
Hitachi Metals Ltd.
King Roy
McGuthry-Banks Tima M
Sughrue & Mion, PLLC
LandOfFree
Method for producing steel ingot does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing steel ingot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing steel ingot will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4136668