C01G 49/08
Ferroso-ferric oxide [fe3o4]
Official title: Ferroso-ferric oxide [Fe3O4]
C01G49/08 (Ferroso-ferric oxide [fe3o4]) appears on 297 US grants and 315 published applications in this corpus.
Search patents in C01G- Granted patents
- 297
- Published applications
- 315
- Assignees
- 281
- Inventors
- 1,032
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 5 |
| 2003 | 3 | 8 |
| 2004 | 7 | 6 |
| 2005 | 2 | 7 |
| 2006 | 6 | 11 |
| 2007 | 5 | 9 |
| 2008 | 2 | 16 |
| 2009 | 6 | 8 |
| 2010 | 8 | 14 |
| 2011 | 7 | 12 |
| 2012 | 8 | 17 |
| 2013 | 11 | 15 |
| 2014 | 11 | 14 |
| 2015 | 11 | 19 |
| 2016 | 9 | 11 |
| 2017 | 9 | 10 |
| 2018 | 11 | 20 |
| 2019 | 9 | 18 |
| 2020 | 15 | 15 |
| 2021 | 15 | 15 |
| 2022 | 7 | 19 |
| 2023 | 14 | 14 |
| 2024 | 9 | 10 |
| 2025 | 11 | 14 |
| 2026 | 12 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for separating iron element in brine and application thereof26 May 2026US 12,637,360 B2BYD Company Limited
- Method for the gram-scale preparation of ferrite nanoparticles for magnetic hyperthermia applications19 May 2026US 12,633,435 B2Fondazione Istituto Italiano Di Tecnologia
- Method of controlling crystallographic arrangement in mesocrystals21 Apr 2026US 12,606,454 B2Korea University Research and Business Foundation
- Mapping nanoparticles14 Apr 2026US 12,599,683 B2Ferronova Pty Ltd
- Method for producing reduced form of metal oxides14 Apr 2026US 12,601,030 B2K.K. Sun Metalon
- Mixed ferrite nanoparticles and uses thereof27 Aug 2026US 2026/0250149 A1Institut National De La Recherche Scientifique
- A process for producing iron oxide pellets27 Aug 2026US 2026/0250791 A1Iron Ore Company of Canada
- Method for producing reduced form of metal oxide23 Jul 2026US 2026/0209886 A1K.K. Sun Metalon
- Method of synthesizing core-shell iron oxide nbrief description anoparticles through continuous synthesis of core and shell in single reaction chamber2 Jul 2026US 2026/0184593 A1UIF (University Industry Foundation), Yonsei University
- Iron feedstock conversion system with improved efficiency21 May 2026US 2026/0139337 A1Electrasteel, Inc.
Most cited
By later US patents
- Very high purity fine powders and methods to produce such powders142US 6,569,397 B12003
- High purity fine metal powders and methods to produce such powder117US 6,786,950 B2NanoProducts Corporation · 2004
- Process for reducing sulfur emissions with calcium-containing sorbents75US 5,368,617 AGenesis Research Corporation · 1994
- Synthesis of magnetite nanoparticles and the process of forming Fe-based nanomaterials70US 6,962,685 B2International Business Machines Corporation · 2005
- Method and apparatus for purifying hydrogen fluoride62US 4,952,386 AAthens Corporation · 1990