C21B 13/0013
Introduction of iron oxide into a bath of molten iron containing a
Official title: {introduction of iron oxide into a bath of molten iron containing a carbon reductant}
C21B13/0013 (Introduction of iron oxide into a bath of molten iron containing a) appears on 275 US grants and 124 published applications in this corpus.
Search patents in C21B- Granted patents
- 275
- Published applications
- 124
- Assignees
- 103
- Inventors
- 379
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 13 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 8 | 0 |
| 1995 | 13 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 11 | 0 |
| 2000 | 8 | 0 |
| 2001 | 25 | 1 |
| 2002 | 16 | 4 |
| 2003 | 8 | 6 |
| 2004 | 2 | 5 |
| 2005 | 3 | 2 |
| 2006 | 1 | 11 |
| 2007 | 1 | 5 |
| 2008 | 2 | 5 |
| 2009 | 8 | 10 |
| 2010 | 7 | 10 |
| 2011 | 8 | 11 |
| 2012 | 5 | 4 |
| 2013 | 12 | 6 |
| 2014 | 2 | 9 |
| 2015 | 4 | 4 |
| 2016 | 9 | 3 |
| 2017 | 3 | 1 |
| 2018 | 4 | 5 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 2 | 3 |
| 2022 | 1 | 4 |
| 2023 | 4 | 4 |
| 2024 | 0 | 4 |
| 2025 | 3 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing liquid pig iron from a DRI product25 Aug 2026US 12,716,105 B2SMS group GmbH
- Method of introducing a metalliferous feed in an ironmaking process19 May 2026US 12,630,892 B2Tata Steel Ijmuiden B.V.
- Hot metal production from DRI with electric arc heating16 Dec 2025US 12,497,668 B2Kobe Steel, Ltd.
- Method for iron making by continuous smelting reduction5 Aug 2025US 12,378,614 B2Dongda Nonferrous Solid Waste Technology Research Institute (Liaoling) Co., Ltd
- Process for the smelting of a metalliferous feedstock material4 Mar 2025US 12,241,133 B2African Rainbow Minerals Limited
- Sulfur management in a smelting process21 May 2026US 2026/0139336 A1Nucor Corporation
- Management of offgas duct accretions in a smelting process30 Apr 2026US 2026/0117331 A1Nucor Corporation
- Hot Metal Production from DRI with Electric Arc Heating12 Mar 2026US 2026/0071288 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Recarburizer and method of producing same9 Oct 2025US 2025/0313909 A1SK Innovation Co., Ltd.
- Method of reducing iron ore powder22 May 2025US 2025/0163525 A1Jfe Steel Corporation
Most cited
By later US patents
- Method and system for energy-optimized and CO2 emission-optimized iron production101US 8,419,825 B2Siemens Vai Metals Technologies GmbH · 2013
- Method of producing metals and metal alloys78US 6,267,799 B1Technological Resources Pty. Limited · 2001
- Method for producing molten iron by submerged combustion69US 4,238,226 AMidrex Corporation · 1980
- Apparatus for producing molten iron by submerged combustion67US 4,270,740 AMidrex Corporation · 1981
- Method of producing metals and metal alloys45US 6,083,296 ATechnological Resources Pty. Limited · 2000