H01F 1/0571
In the form of particles
Official title: {in the form of particles, e.g. rapid quenched powders or ribbon flakes}
H01F1/0571 (In the form of particles) appears on 1,380 US grants and 1,447 published applications in this corpus.
Search patents in H01F- Granted patents
- 1,380
- Published applications
- 1,447
- Assignees
- 387
- Inventors
- 2,225
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 9 | 0 |
| 1988 | 21 | 0 |
| 1989 | 36 | 0 |
| 1990 | 43 | 0 |
| 1991 | 48 | 0 |
| 1992 | 38 | 0 |
| 1993 | 39 | 0 |
| 1994 | 20 | 0 |
| 1995 | 31 | 0 |
| 1996 | 27 | 0 |
| 1997 | 19 | 0 |
| 1998 | 11 | 0 |
| 1999 | 23 | 0 |
| 2000 | 21 | 0 |
| 2001 | 33 | 10 |
| 2002 | 36 | 51 |
| 2003 | 38 | 34 |
| 2004 | 25 | 48 |
| 2005 | 22 | 33 |
| 2006 | 23 | 33 |
| 2007 | 29 | 37 |
| 2008 | 16 | 26 |
| 2009 | 26 | 36 |
| 2010 | 22 | 51 |
| 2011 | 30 | 59 |
| 2012 | 43 | 64 |
| 2013 | 26 | 71 |
| 2014 | 16 | 73 |
| 2015 | 32 | 86 |
| 2016 | 41 | 74 |
| 2017 | 55 | 65 |
| 2018 | 68 | 83 |
| 2019 | 68 | 63 |
| 2020 | 62 | 62 |
| 2021 | 48 | 68 |
| 2022 | 55 | 77 |
| 2023 | 53 | 60 |
| 2024 | 43 | 83 |
| 2025 | 41 | 56 |
| 2026 | 35 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01F 1/0575Pressed, sintered or bonded together1,184
- H01F 1/0573Obtained by reduction or by hydrogen decrepitation or embrittlement167
- H01F 1/0572With a protective layer117
- H01F 1/0574Obtained by liquid dynamic compaction28
- H01F 1/05712Wherein the powder particle further includes one or more rare earth [re]0
Recent patents
- Method of manufacturing permanent magnets6 Oct 2026US 12,755,879 B2
- R-T-B based permanent magnet and method for manufacturing same29 Sep 2026US 12,749,603 B2TDK Corporation
- Compound for bonded magnet, bonded magnet, method of producing same, and resin composition for bonded magnets29 Sep 2026US 12,749,619 B2Nichia Corporation
- Permeating treatment method for radially oriented sintered magnet, magnet, and composition for magnet permeation29 Sep 2026US 12,749,620 B2China Rare Earth Radimag (Shenzhen) Technology Co., Ltd.
- Grain boundary diffusion cerium-based magnet containing REFe2 phase and preparation method thereof22 Sep 2026US 12,744,138 B2Central Iron and Steel Research Institute
- Magnetic steel containing high-abundance rare earth elements, preparation method therefor, and use thereof8 Oct 2026US 2026/0311917 A1FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.
- Permanent magnet1 Oct 2026US 2026/0302011 A1Korea Institute of Materials Science
- Magnetic granular material, manufacturing method of the same, and manufacturing method of rare earth magnet1 Oct 2026US 2026/0302012 A1Honda Motor Co., Ltd.
- Rare earth magnet and manufacturing method of the same1 Oct 2026US 2026/0302060 A1Honda Motor Co., Ltd.
- Sintered r-t-b based magnet24 Sep 2026US 2026/0290663 A1Proterial, Ltd.
Most cited
By later US patents
- Method of making environmentally stable reactive alloy powders127US 5,372,629 AIowa State University Research Foundation, Inc. · 1994
- Thin film solar cell including a spatially modulated intrinsic layer119US 4,816,082 AEnergy Conversion Devices, Inc. · 1989
- Magnetic materials and permanent magnets113US 4,770,723 ASumitomo Special Metals Co., Ltd. · 1988
- Environmentally stable reactive alloy powders and method of making same91US 5,811,187 AIowa State University Research Foundation, Inc. · 1998
- Process for producing permanent magnet materials87US 4,597,938 ASumitomo Special Metals Co., Ltd. · 1986