Title of Invention

RARE EARTH PERMANENT MAGNET

Abstract A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1 aR2 bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, and grain boundaries having concentration of R2/ (R1+R2) which is on the average higher than the concentration of R2 / (R1+R2) contained in primary phase grains of (R1,R2)2T14A tetragonal system form a three-dimensional network structure which is continuous from the magnet body surface to a depth of at least 10 μm. The invention provides R-Fe-B sintered magnets which exhibit a high coercive force.
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Documents:

111-MUM-2006-ABSTRACT(24-1-2006).pdf

111-MUM-2006-ABSTRACT(GRANTED)-(1-9-2011).pdf

111-MUM-2006-CANCELLED PAGES(13-10-2010).pdf

111-MUM-2006-CLAIMS(24-1-2006).pdf

111-MUM-2006-CLAIMS(AMENDED)-(13-10-2010).pdf

111-MUM-2006-CLAIMS(GRANTED)-(1-9-2011).pdf

111-MUM-2006-CLAIMS(MARKED COPY)-(13-10-2010).pdf

111-MUM-2006-CORRESPONDENCE(13-10-2010).pdf

111-MUM-2006-CORRESPONDENCE(19-2-2008).pdf

111-MUM-2006-CORRESPONDENCE(24-10-2011).pdf

111-MUM-2006-CORRESPONDENCE(IPO)-(5-9-2011).pdf

111-MUM-2006-CORRESPONDENCE(IPO)-(9-6-2010).pdf

111-MUM-2006-DESCRIPTION(COMPLETE)-(24-1-2006).pdf

111-MUM-2006-DESCRIPTION(GRANTED)-(1-9-2011).pdf

111-MUM-2006-DRAWING(24-1-2006).pdf

111-MUM-2006-DRAWING(GRANTED)-(1-9-2011).pdf

111-MUM-2006-FORM 1(24-1-2006).pdf

111-MUM-2006-FORM 1(24-10-2011).pdf

111-MUM-2006-FORM 18(20-2-2008).pdf

111-MUM-2006-FORM 2(COMPLETE)-(24-1-2006).pdf

111-MUM-2006-FORM 2(GRANTED)-(1-9-2011).pdf

111-MUM-2006-FORM 2(TITLE PAGE)-(24-1-2006).pdf

111-MUM-2006-FORM 2(TITLE PAGE)-(24-10-2011).pdf

111-MUM-2006-FORM 2(TITLE PAGE)-(GRANTED)-(1-9-2011).pdf

111-MUM-2006-FORM 3(13-10-2010).pdf

111-MUM-2006-FORM 3(24-1-2006).pdf

111-MUM-2006-FORM 3(24-10-2011).pdf

111-MUM-2006-FORM 5(24-1-2006).pdf

111-MUM-2006-FORM 5(24-10-2011).pdf

111-MUM-2006-GENERAL POWER OF ATTORNEY(24-1-2006).pdf

111-MUM-2006-PETITION UNDER RULE 137(13-10-2010).pdf

111-MUM-2006-REPLY TO EXAMINATION REPORT(13-10-2010).pdf

111-MUM-2006-SPECIFICATION(AMENDED)-(13-10-2010).pdf


Patent Number 248856
Indian Patent Application Number 111/MUM/2006
PG Journal Number 36/2011
Publication Date 09-Sep-2011
Grant Date 01-Sep-2011
Date of Filing 24-Jan-2006
Name of Patentee SHIN-ETSU CHEMICAL CO
Applicant Address 6-1, OTEMACHI 2-CHOME, CHITYODA-KU, TOKYO, JAPAN
Inventors:
# Inventor's Name Inventor's Address
1 Hajime Nakamura C/o Magnetic Materials Research Center, Shinu-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome Echizen-shi,Fukui-Ken
2 Koichi Hirota C/o Magnetic Materials Research Center, Shinu-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome Echizen-shi,Fukui-Ken kOCHI hIROTA
3 Masanobu Shimao C/o Magnetic Materials Research Center, Shinu-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome Echizen-shi,Fukui-Ken
4 Takehisa Minowa C/o Magnetic Materials Research Center, Shinu-Etsu Chemical Co., Ltd., 1-5, Kitago 2-chome Echizen-shi,Fukui-Ken
PCT International Classification Number H01F1/053
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA