C21B 5/001
Injecting additional fuel or reducing agents
Official title: {Injecting additional fuel or reducing agents}
C21B5/001 (Injecting additional fuel or reducing agents) appears on 242 US grants and 156 published applications in this corpus.
Search patents in C21B- Granted patents
- 242
- Published applications
- 156
- Assignees
- 160
- Inventors
- 621
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 7 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 8 | 0 |
| 1983 | 12 | 0 |
| 1984 | 13 | 0 |
| 1985 | 11 | 0 |
| 1986 | 13 | 0 |
| 1987 | 11 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 2 |
| 2003 | 2 | 3 |
| 2004 | 1 | 2 |
| 2005 | 1 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 7 |
| 2011 | 5 | 6 |
| 2012 | 4 | 9 |
| 2013 | 5 | 4 |
| 2014 | 3 | 4 |
| 2015 | 6 | 21 |
| 2016 | 3 | 7 |
| 2017 | 9 | 5 |
| 2018 | 6 | 2 |
| 2019 | 6 | 3 |
| 2020 | 3 | 4 |
| 2021 | 3 | 3 |
| 2022 | 3 | 20 |
| 2023 | 1 | 12 |
| 2024 | 3 | 11 |
| 2025 | 5 | 12 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Blast furnace—converter steel production method based on carbon cycling28 Jul 2026US 12,692,561 B2Cisdi Engineering Co., Ltd
- Biocarbon pellets with adjustable grindability index16 Jun 2026US 12,655,362 B2Carbon Technology Holdings, LLC
- Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production9 Jun 2026US 12,649,959 B2Carbon Technology Holdings, LLC
- Method for operating blast furnace12 May 2026US 12,624,404 B2Jfe Steel Corporation
- Hydrogen-rich blast furnace ironmaking system based on mass-energy conversion, and production control method therefor5 May 2026US 12,618,119 B2Changli County Xingguo Precision Machine Parts Co., Ltd.
- Systematic carbon emissions reduction method for whole process of production and casting3 Sep 2026US 2026/0258513 A1Jiqing Low Carbon Technology (Qinhuangdao) Co., Ltd.
- Method and system for decarbonizing a process involving combustion of hydrocarbon-based fuel27 Aug 2026US 2026/0250852 A1
- Hot metal temperature control method, hot metal temperature control device, hot metal temperature control system, and terminal device20 Aug 2026US 2026/0242883 A1Jfe Steel Corporation
- Process control method, blast furnace operation method, hot metal production method, process control device, and program30 Jul 2026US 2026/0218321 A1Jfe Steel Corporation
- Blast furnace operating method16 Jul 2026US 2026/0201484 A1Jfe Steel Corporation
Most cited
By later US patents
- Coal-water slurry and method for its preparation67US 4,282,006 AAlfred University Research Foundation, Inc. · 1981
- Pulverized coal carriability improver62US 6,083,289 AKao Corporation · 2000
- Method and apparatus for producing reformed gases48US 6,524,356 B2Midrex Technologies, Inc. · 2003
- Method of distributing and transporting powdered or granular material47US 4,529,336 ADenka Consultant & Engineering Co., Ltd. · 1985
- Apparatus for electric steelmaking43US 5,714,113 AAmerican Combustion, Inc. · 1998