Title of Invention

PREPARATION OF RARE EARTH PERMANENT MAGNET MATERIAL

Abstract A method for producing a rare earth permanent magnet material, characterized in that it comprises providing a sintered magnet article comprising an R1-Fe-B based composition (wherein R1 represents one or more selected from the rare earth elements including Y and Sc) and a powder containing one or more selected from an oxide of R2, a fluoride of R3 and an acid fluoride of R4 (wherein R2, R3 and R4 represent one or more selected from the rare earth elements including Y and Sc, respectively), causing the powder to be present on the surface of said magnet article, and subjecting said magnet article and powder to a heat treatment at a temperature of the sintering temperature for said magnet or lower under vacuum or in an inert gas. The above method allows the production of a miniature or thin high performance permanent magnet having a high residual magnet flux density and high coercive force, with high productivity.
Full Text

Documents:

330-mumnp-2006-abstract(23-03-2006).pdf

330-mumnp-2006-abstract(granted)-(11-6-2010).pdf

330-mumnp-2006-claims(23-03-2006).pdf

330-mumnp-2006-claims(granted)-(11-6-2010).pdf

330-mumnp-2006-correspondence(11-09-2007)pdf.pdf

330-MUMNP-2006-CORRESPONDENCE(19-5-2010).pdf

330-mumnp-2006-correspondence(ipo)-(7-7-2010).pdf

330-mumnp-2006-description(complete)-(23-03-2006).pdf

330-mumnp-2006-description(granted)-(11-6-2010).pdf

330-mumnp-2006-drawing(23-03-2006).pdf

330-mumnp-2006-drawing(granted)-(11-6-2010).pdf

330-mumnp-2006-form 1(23-03-2006).pdf

330-mumnp-2006-form 18(12-9-2007).pdf

330-mumnp-2006-form 18(23-03-2006).pdf

330-mumnp-2006-form 2(23-03-2006).pdf

330-mumnp-2006-form 2(granted)-(11-6-2010).pdf

330-mumnp-2006-form 2(title page)-(23-03-2006).pdf

330-mumnp-2006-form 2(title page)-(granted)-(11-6-2010).pdf

330-mumnp-2006-form 3(23-03-2006).pdf

330-mumnp-2006-form 5(23-03-2006).pdf

330-mumnp-2006-form-pct-isa-210-(23-03-2006).pdf

330-mumnp-2006-general power of attornet(23-03-2006).pdf

330-MUMNP-2006-GENERAL POWER OF ATTORNEY(19-5-2010).pdf

330-mumnp-2006-other document(23-3-2006).pdf

330-mumnp-2006-wo international publication report(11-9-2007).pdf


Patent Number 240980
Indian Patent Application Number 330/MUMNP/2006
PG Journal Number 25/2010
Publication Date 18-Jun-2010
Grant Date 11-Jun-2010
Date of Filing 23-Mar-2006
Name of Patentee SHIN-ETSU CHEMICAL CO LTD
Applicant Address 6-1, OTEMACHI 2-CHOME, CHIYODA-KU, TOKYO, 100-0004
Inventors:
# Inventor's Name Inventor's Address
1 KOICHI HIROTA c/o Magnetic Materials Research Center, Shin-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome Echizen-shi, Fukui-ken 915-0802
2 HAJIME NAKAMURA c/o Magnetic Materials Research Center, Shin-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome, Echizen-shi, Fukui-ken 915-0802
3 TAKEHISA MINOWA c/o Magnetic Materials Research Center, Shin-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome Echizen-shi, Fukui-ken 915-0802
PCT International Classification Number H01F41/02
PCT International Application Number PCT/JP05/005134
PCT International Filing date 2005-03-22
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 2004-304543 2004-10-19 Japan
2 2004-377379 2004-12-27 Japan