Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Reexamination Certificate
2007-01-12
2011-10-18
Sheenan, John (Department: 1736)
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
C148S101000, C148S302000
Reexamination Certificate
active
08038807
ABSTRACT:
First, an R—Fe—B based rare-earth sintered magnet body including, as a main phase, crystal grains of an R2Fe14B type compound that includes a light rare-earth element RL, which is at least one of Nd and Pr, as a major rare-earth element R is provided. Next, an M layer, including a metallic element M that is at least one element selected from the group consisting of Al, Ga, In, Sn, Pb, Bi, Zn and Ag, is deposited on the surface of the sintered magnet body and then an RH layer, including a heavy rare-earth element RH that is at least one element selected from the group consisting of Dy, Ho and Tb, is deposited on the M layer. Thereafter, the sintered magnet body is heated, thereby diffusing the metallic element M and the heavy rare-earth element RH from the surface of the magnet body deeper inside the magnet.
REFERENCES:
patent: 5383978 (1995-01-01), Yamamoto et al.
patent: 2006/0278517 (2006-12-01), Machida et al.
patent: 2007/0034299 (2007-02-01), Machida et al.
patent: 2008/0257716 (2008-10-01), Nagata et al.
patent: 2009/0020193 (2009-01-01), Ohta et al.
patent: 61-281850 (1986-12-01), None
patent: 62-188745 (1987-08-01), None
patent: 62-192566 (1987-08-01), None
patent: 01-117303 (1989-05-01), None
patent: 2004-304038 (2004-10-01), None
patent: 2005-11973 (2005-01-01), None
patent: 2005-175138 (2005-06-01), None
patent: 2005-285859 (2005-10-01), None
patent: 2005-294558 (2005-10-01), None
patent: 2006/100968 (2006-09-01), None
patent: 2006/112403 (2006-10-01), None
English Translation of JP 62192566.
English Translation of JP 62192566, Publication date of JP 62192566 is Aug. 24, 1987 (translation previously provided in Office action mailed Sep. 30, 2010).
Official Communication issued in International Patent Application No. PCT/JP2007/050304, mailed on Apr. 17, 2007.
English translation of the official communication issued in counterpart International Application No. PCT/JP2007/050304, mailed on Aug. 14, 2008.
Official Communication issued in corresponding European Patent Application No. 07706646.2, mailed on Oct. 28, 2009.
Morimoto Hideyuki
Noumi Masao
Odaka Tomoori
Hitachi Metals Ltd.
Keating & Bennett LLP
Sheenan John
LandOfFree
R-Fe-B rare-earth sintered magnet and process for producing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with R-Fe-B rare-earth sintered magnet and process for producing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and R-Fe-B rare-earth sintered magnet and process for producing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4293018