C21B 13/125
By using plasma
Official title: {By using plasma}
C21B13/125 (By using plasma) appears on 55 US grants and 17 published applications in this corpus.
Search patents in C21B- Granted patents
- 55
- Published applications
- 17
- Assignees
- 40
- Inventors
- 133
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 2 | 2 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 3 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 1 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermal energy recovery systems for non-contact temperature detection of molten steel in steelmaking process23 Dec 2025US 12,503,736 B1Central South University
- Method and system for producing low carbon ferroalloy from chromite ore4 Jun 2024US 12,000,017 B2MM Metals USA, LLC
- Production apparatus and method for electric arc furnace steelmaking with fully continuous ultra-short process16 Nov 2021US 11,174,524 B1University of Science and Technology Beijing
- Systems and methods for lowering the reduction of iron ore energy7 Jul 2020US 10,704,121 B1Capital One Services, LLC
- System and method of producing low carbon ferrochrome and low carbon ferrochrome produced thereby16 Jun 2020US 10,683,564 B1MM Metals USA, LLC
- Low-temperature microwave-powered plasma reduction system and methodology18 Jun 2026US 2026/0168043 A1Starfire Industries LLC
- Non-thermal plasma direct reduction of ore ultrafines12 Mar 2026US 2026/0071289 A1Starfire Industries LLC
- Method and apparatus for metals, alloys, mattes, or enriched and cleaned slags production from predominantly oxide feeds16 Oct 2025US 2025/0320570 A1Hertha Metals, Inc.
- Method for producing steel using super-pure iron ore powder and hydrogen17 Apr 2025US 2025/0122587 A1
- Method and system for producing low carbon ferroalloy from chromite ore12 Sep 2024US 2024/0301530 A1MM Metals USA, LLC
Most cited
By later US patents
- Plasma fired feed nozzle32US 4,761,793 AElectric Power Research Institute, Inc. · 1988
- Method for the melting, combustion or incineration of materials and apparatus therefor29US 5,548,611 ASchuller International, Inc. · 1996
- Method of, and arrangement for, producing molten pig iron or steel pre-material22US 4,396,421 AKorf-Stahl AG · 1983
- Plasma furnace and a method of operating the same18US 5,579,705 AKansai Denryoku Kabushiki Kaisha · 1996
- Plant for producing steel from scrap17US 4,740,989 AVoest-Alpine Aktiengesellschaft · 1988