H01F 1/057

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Class  H01F : MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES


Subclass 1/057: Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties (thin magnetic films characterised by their composition H01F 10/1) of inorganic materials (H01F 1/44 takes precedence) characterised by their coercivity of hard-magnetic materials metals or alloys Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
12243683 Additive manufacturing of ND—FE—B magnets with insulating layersNov 10, 23Mar 04, 25Ford Global Technologies, LLC
12234534 Sintered magnet and production method for sintered magnetMar 08, 19Feb 25, 25Hitachi, Ltd.
12230438 Compound for bonded magnet, bonded magnet, method of producing same, and resin composition for bonded magnetsNov 16, 21Feb 18, 25Nichia Corporation
12205737 Method for manufacturing rare earth permanent magnetSep 13, 18Jan 21, 25Star Group Ind. Co., Ltd.
12205738 Method of producing sintered magnetOct 07, 20Jan 21, 25LG Chem, Ltd.
12205739 Extrusion-compression method for producing bonded permanent magnetsNov 18, 21Jan 21, 25UT - Battelle LLC; University of Tennessee Research Foundation;
12205762 Feedstock and heterogeneous structure for tough rare earth permanent magnets and production thereforOct 15, 18Jan 21, 25Iowa State University Research Foundation, Inc.
12198840 Rare earth permanent magnet material and raw material composition,preparation method therefor and use thereofJul 22, 20Jan 14, 25FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.
12142403 Anisotropic bonded magnet and preparation method thereofMay 26, 21Nov 12, 24GRIREM HI-TECH CO., LTD.; GRIREM ADVANCED MATERIALS CO., LTD; Grirem (Rongcheng) Co., Ltd.;
12131850 Rare earth magnet and preparation method thereofJun 24, 21Oct 29, 24SANVAC (BEIJING) MAGNETICS CO., LTD.; BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.;
12119150 Method for producing sintered magnet and sintered magnetSep 24, 20Oct 15, 24LG Chem, Ltd.
12112884 Method for improving corrosion resistance of neodymium-iron-boron materials by low-temperature oxidation and/or nitridation treatmentApr 01, 22Oct 08, 24ZHEJIANG UNIVERSITY
12100544 Device and method for improving coercivity of ring-shaped NdFeB magnetMar 23, 21Sep 24, 24Yantai Shougang Magnetic Materials Inc
12092707 Method for identifying irreversible demagnetization of grain boundary diffusion NdFeB magnetJan 25, 24Sep 17, 24Hangzhou Magmax Technology Co., Ltd.; Hangzhou Foresee Group Holding Co., Ltd.;
12087481 Auxiliary alloy casting piece, high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereofDec 30, 22Sep 10, 24Baotou Jinshan Magnetic Material Co., Ltd.
12087482 Flexible permanent magnetic material, preparation method and application thereof in magnetic biological effect productsAug 30, 23Sep 10, 24Beijing Peking University WBL Corporation Ltd.
12080478 Gradient Nd—Fe—B magnet and a method of productionJul 01, 19Sep 03, 24YANTAI SHOUGANG MAGNETIC MATERIALS INC.
12074475 Rare earth permanent magnet and rotating electric machine including the sameMar 22, 21Aug 27, 24TDK Corporation
12062472 Neodymium-iron-boron magnetic body having gradient distribution and preparation method thereofAug 24, 20Aug 13, 24JL MAG RARE-EARTH CO., LTD.
12057263 Low-cost rare earth magnet and corresponding manufacturing method thereofSep 23, 22Aug 06, 24Yantai Dongxing Magnetic Materials Inc.

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Recent Publications

Publication #TitleFiling DatePub DatePatent Owner
2025/0118,465 Modified Sintered Neodymium-iron-boron Permanent Magnetic Material and Preparation Method ThereforNov 30, 22Apr 10, 25Not available
2025/0104,909 METHOD AND SYSTEMS FOR UNIFORM DISTRIBUTION OF ADDITIVE DOMAINS IN THE GRAIN BOUNDARY OF MAGNETSSep 22, 23Mar 27, 25Not available
2025/0095,913 ELECTRIC PRESS WITH DISC STACKINGDec 11, 23Mar 20, 25Not available
2025/0095,914 FEEDSTOCK AND HETEROGENEOUS STRUCTURES FOR TOUGH RARE EARTH PERMANENT MAGNETS AND PRODUCTION PROCESS THEREFORDec 04, 24Mar 20, 25Not available
2025/0087,394 NEODYMIUM-IRON-BORON MAGNET MATERIAL AND PREPARATION METHOD THEREFOR AND APPLICATION THEREONov 04, 22Mar 13, 25Not available
2025/0075,295 HIGH-PERFORMANCE SINTERED NEODYMIUM-IRON-BORON MAGNET AND PREPARATION METHOD THEREFORJul 20, 22Mar 06, 25Not available
2025/0069,784 NEODYMIUM-IRON-BORON MAGNET AS WELL AS PREPARATION METHOD THEREFOR AND USE THEREOFNov 28, 22Feb 27, 25Not available
2025/0069,785 NEODYMIUM-IRON-BORON MAGNET MATERIAL, PREPARATION THEREFOR, AND APPLICATION THEREOFNov 04, 22Feb 27, 25FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.
2025/0054,664 HOT-DEFORMED R-Fe-B MAGNET FOR VARIABLE-MAGNETIC-FORCE MOTOR, VARIABLE-MAGNETIC-FORCE MOTOR, AND ELECTRONIC DEVICE FOR VEHICLE AND HOUSEHOLDDec 12, 22Feb 13, 25NATIONAL INSTITUTE FOR MATERIALS SCIENCE
2025/0043,154 METHOD FOR PREPARING FLEXIBLE MAGNETIC STRIP CARRIER, FLEXIBLE MAGNETIC STRIP CARRIER AND EYELASH DECORATIONOct 18, 24Feb 06, 25Shenzhen Mlen Biotechnology Co., LTD
2025/0037,933 METHOD FOR PRODUCING RARE EARTH IRON-BASED SINTERED MAGNET, APPARATUS FOR PRODUCING RARE EARTH IRON-BASED SINTERED MAGNET, AND RARE EARTH IRON-BASED SINTERED MAGNETNov 04, 22Jan 30, 25Not available
2025/0010,369 CYLINDRICAL BONDED MAGNET, METHOD OF PRODUCING CYLINDRICAL BONDED MAGNET, AND MOLD FOR FORMING CYLINDRICAL BONDED MAGNETJul 05, 24Jan 09, 25Nichia Corporation
2025/0014,792 R-T-B BASED PERMANENT MAGNETNov 02, 22Jan 09, 25501 TDK Corporation
2025/0011,904 R-T-B PERMANENT MAGNETNov 02, 22Jan 09, 25TDK CORPORTION
2025/0006,411 HIGH-REMANENCE NEODYMIUM-IRON-BORON MAGNET, AND PREPARATION METHOD AND USE THEREOFSep 22, 22Jan 02, 25Not available
2024/0420,873 ANISOTROPIC NANOCRYSTALLINE RARE EARTH PERMANENT MAGNET AND PREPARATION METHOD THEREOFDec 21, 23Dec 19, 24Not available
2024/0412,903 HIGH-COERCIVITY ND-FE-B SERIES SINTERED MAGNET AND PREPARATION METHOD AND APPLICATION THEREOFJun 07, 23Dec 12, 24Not available
2024/0395,456 METHOD FOR PRODUCING RFeB-BASED MAGNET, AND ALLOY FOR GRAIN BOUNDARY DIFFUSION PROCESS USED IN THE METHODMay 17, 24Nov 28, 24Not available
2024/0363,270 METHOD OF PREPARING MAGNETIC POWDER AND MAGNETIC POWDEROct 03, 23Oct 31, 24Hyundai Motor Company; KIA CORPORATION; Industry-University Cooperation Foundation Hanyang University ERICA Campus;
2024/0363,271 R-T-B BASED PERMANENT MAGNET AND METHOD OF MANUFACTURING THE SAMEApr 25, 24Oct 31, 24TDK Corporation

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Patents Issued To Date - By Filing Year

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