C21B 13/143
Injection of partially reduced ore into a molten bath
Official title: {Injection of partially reduced ore into a molten bath}
C21B13/143 (Injection of partially reduced ore into a molten bath) appears on 95 US grants and 105 published applications in this corpus.
Search patents in C21B- Granted patents
- 95
- Published applications
- 105
- Assignees
- 59
- Inventors
- 238
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 4 |
| 2006 | 1 | 7 |
| 2007 | 3 | 3 |
| 2008 | 0 | 7 |
| 2009 | 2 | 6 |
| 2010 | 9 | 8 |
| 2011 | 6 | 11 |
| 2012 | 8 | 8 |
| 2013 | 6 | 2 |
| 2014 | 5 | 8 |
| 2015 | 6 | 8 |
| 2016 | 7 | 4 |
| 2017 | 3 | 1 |
| 2018 | 1 | 3 |
| 2019 | 2 | 1 |
| 2020 | 2 | 0 |
| 2021 | 1 | 2 |
| 2022 | 2 | 3 |
| 2023 | 1 | 2 |
| 2024 | 0 | 4 |
| 2025 | 2 | 4 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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.
- Method for producing molten steel22 Apr 2025US 12,281,365 B2Kobe Steel, Ltd.
- Process for the smelting of a metalliferous feedstock material4 Mar 2025US 12,241,133 B2African Rainbow Minerals Limited
- Integration of DR plant and electric DRI melting furnace for producing high performance iron17 Oct 2023US 11,788,159 B2Midrex Technologies, Inc.
- Method for producing molten iron6 Aug 2026US 2026/0226569 A1Jfe Steel Corporation
- Carbon dioxide capture, carbon resource utilization, and hydrogen production system for steel mill2 Jul 2026US 2026/0183700 A1Lowcarbon Co., Ltd.
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
- Optimized melting of compacted dri12 Feb 2026US 2026/0043103 A1Primetals Technologies Austria GmbH
- A method for producing molten pig iron into an electrical smelting unit22 Jan 2026US 2026/0022430 A1
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
- High pressure dry coal slurry extrusion pump48US 7,717,046 B2Pratt & Whitney Rocketdyne, Inc. · 2010
- Method for producing steel31US 4,045,214 AFried. Krupp Gesellschaft mit beschrankter Haftung · 1977
- Method for smelting reduction of iron ore and apparatus therefor30US 5,065,985 ANKK Corporation · 1991
- Process for producing metals and metal alloys in a smelt reduction vessel28US 5,489,325 ACRA Services Limited · 1996