RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF
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United States of America Patent
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app pub date -
Dec 19, 2017
filing date -
Dec 28, 2016
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Abstract
A rare earth magnet comprising a main phase, a grain boundary phase present around the main phase, and an intermediate phase sandwiched between the main phase and the grain boundary phase, and having a total composition of the rare earth magnet represented by the formula: CepR1qT(100-p-q-r-s)BrM1s.(R21-xM2x)t R1 and R2 are a rare earth element except for Ce, T is one or more members selected from Fe, Ni, and Co, M1 is a minor element, and M2 is an alloy element that makes, the melting point of R21-xM2x to be lower than the melting point of R2 the concentration of Ce is higher in the main phase than in the intermediate phase, and the concentration of R2 is higher in the intermediate phase than in the main phase, and a production method thereof.
First Claim
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Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
---|---|---|---|---|---|
JP | B2 | JP6815863 | Dec 28, 2016 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | 希土類磁石及びその製造方法 | Jan 20, 2021 | |||
DE | A1 | DE102017130191 | Dec 15, 2017 | Patent | Application |
Type : Patent Sub-Type : Application | |||||
DOC. LAID OPEN (FIRST PUBLICATION) | Seltenerd-Magnet und Herstellungsverfahren desselben | Jun 28, 2018 | |||
CN | A | CN108335814 | Dec 19, 2017 | Patent | Application |
Type : Patent Sub-Type : Application | |||||
UNEXAMINED APPLICATION FOR A PATENT FOR INV. | Rare-earth magnet and its manufacturing method | Jul 27, 2018 |
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
TOYOTA JIDOSHA KABUSHIKI KAISHA | 1 TOYOTA-CHO TOYOTA-SHI AICHI-KEN 471-8571 |
International Classification(s)

- 2017 Application Filing Year
- B22F Class
- 1425 Applications Filed
- 917 Patents Issued To-Date
- 64.36 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
ITO, Masaaki | Susono-shi, JP | 191 | 1408 |
# of filed Patents : 191 Total Citations : 1408 | |||
KISHIMOTO, Hidefumi | Susono-shi, JP | 24 | 69 |
# of filed Patents : 24 Total Citations : 69 | |||
SAKUMA, Noritsugu | Mishima-shi, JP | 55 | 138 |
# of filed Patents : 55 Total Citations : 138 | |||
SHOJI, Tetsuya | Susono-shi, JP | 70 | 220 |
# of filed Patents : 70 Total Citations : 220 | |||
YANO, Masao | Suntou-gun, JP | 48 | 239 |
# of filed Patents : 48 Total Citations : 239 |
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Patent Citation Ranking
- 2 Citation Count
- B22F Class
- 45.92 % this patent is cited more than
- 7 Age
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