H01F 1/445
The magnetic component being a compound
Official title: {the magnetic component being a compound, e.g. Fe3O4 (H01F1/447 takes precedence)}
H01F1/445 (The magnetic component being a compound) appears on 124 US grants and 109 published applications in this corpus.
Search patents in H01F- Granted patents
- 124
- Published applications
- 109
- Assignees
- 112
- Inventors
- 357
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 10 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 3 |
| 2005 | 3 | 2 |
| 2006 | 0 | 4 |
| 2007 | 1 | 4 |
| 2008 | 2 | 2 |
| 2009 | 2 | 2 |
| 2010 | 1 | 6 |
| 2011 | 2 | 4 |
| 2012 | 3 | 8 |
| 2013 | 3 | 7 |
| 2014 | 7 | 3 |
| 2015 | 3 | 10 |
| 2016 | 3 | 7 |
| 2017 | 6 | 4 |
| 2018 | 3 | 1 |
| 2019 | 4 | 10 |
| 2020 | 5 | 2 |
| 2021 | 4 | 6 |
| 2022 | 0 | 7 |
| 2023 | 1 | 3 |
| 2024 | 12 | 5 |
| 2025 | 3 | 5 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Magnetic nanoparticles for sample separation24 Feb 2026US 12,559,385 B2Agilent Technologies, Inc.
- Cobalt ferrite particle production method and cobalt ferrite particles produced thereby3 Feb 2026US 12,540,082 B2Nittetsu Mining Co., Ltd.
- Composition and heat transport device3 Feb 2026US 12,540,266 B2Canon Kabushiki Kaisha
- Patterning structures in reactive ferrofluidic polymer resins23 Dec 2025US 12,503,563 B2Syracuse University
- Ferrofluid28 Oct 2025US 12,456,565 B2Myneip B.V.
- Magnetic Fluid Composition1 Oct 2026US 2026/0302022 A1Seiko Epson Corporation
- Processing method for ferrofluid used in plastic products and display device23 Jul 2026US 2026/0213054 A1
- Magnetic nanoparticles for sample separation18 Dec 2025US 2025/0382605 A1Agilent Technologies, Inc.
- Method for producing cobalt ferrite particles and cobalt ferrite particles produced by same11 Sep 2025US 2025/0282637 A1Nittetsu Mining Co., Ltd.
- Magnetic slimebot, composition for its manufacture and uses thereof28 Aug 2025US 2025/0270398 A1
Most cited
By later US patents
- Magnetic iron-dextran microspheres466US 4,452,773 ACanadian Patents and Development Limited · 1984
- Methods for the manufacture of magnetically responsive particles159US 5,698,271 AImmunivest Corporation · 1997
- Resuspendable coated magnetic particles and stable magnetic particle suspensions146US 5,597,531 AImmunivest Corporation · 1997
- Colloidal size hydrophobic polymers particulate having discrete particles of an inorganic material dispersed therein112US 4,421,660 AThe Dow Chemical Company · 1983
- Superparamagnetic particles, process for producing the same and their use108US 5,916,539 ASilica Gel Ges. m.b.H. · 1999