C21B 13/0006
Obtaining iron or steel in a molten state
Official title: {obtaining iron or steel in a molten state}
C21B13/0006 (Obtaining iron or steel in a molten state) appears on 417 US grants and 237 published applications in this corpus.
Search patents in C21B- Granted patents
- 417
- Published applications
- 237
- Assignees
- 164
- Inventors
- 647
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 11 | 0 |
| 1989 | 14 | 0 |
| 1990 | 18 | 0 |
| 1991 | 13 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 16 | 0 |
| 1996 | 14 | 0 |
| 1997 | 8 | 0 |
| 1998 | 12 | 0 |
| 1999 | 16 | 0 |
| 2000 | 13 | 0 |
| 2001 | 39 | 1 |
| 2002 | 20 | 6 |
| 2003 | 11 | 6 |
| 2004 | 3 | 12 |
| 2005 | 3 | 4 |
| 2006 | 2 | 16 |
| 2007 | 2 | 10 |
| 2008 | 4 | 7 |
| 2009 | 10 | 15 |
| 2010 | 10 | 11 |
| 2011 | 10 | 13 |
| 2012 | 8 | 9 |
| 2013 | 15 | 7 |
| 2014 | 3 | 12 |
| 2015 | 6 | 9 |
| 2016 | 13 | 8 |
| 2017 | 4 | 2 |
| 2018 | 6 | 7 |
| 2019 | 2 | 2 |
| 2020 | 4 | 3 |
| 2021 | 2 | 8 |
| 2022 | 5 | 8 |
| 2023 | 8 | 9 |
| 2024 | 3 | 16 |
| 2025 | 12 | 22 |
| 2026 | 5 | 14 |
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.
- Systems and methods for steel production14 Apr 2026US 12,601,020 B2Pathfinder Holdings Corp.
- Apparatus for the production of molten iron7 Apr 2026US 12,595,520 B2Tata Steel Ijmuiden B.V.
- Method of operating an electric arc furnace and steel mill24 Mar 2026US 12,584,182 B2Paul Wurth S. A.
- Method for producing molten iron6 Aug 2026US 2026/0226569 A1Jfe Steel Corporation
- Systems and methods for steel production23 Jul 2026US 2026/0209872 A1Pathfinder Holdings Corp.
- 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
- Sulfur management in a smelting process21 May 2026US 2026/0139336 A1Nucor 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