C21C 7/0037
Treating molten ferrous alloys: by injecting powdered material
Official title: {by injecting powdered material}
C21C7/0037 (Treating molten ferrous alloys: by injecting powdered material) appears on 156 US grants and 86 published applications in this corpus.
Search patents in C21C- Granted patents
- 156
- Published applications
- 86
- Assignees
- 118
- Inventors
- 436
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 3 |
| 2002 | 14 | 1 |
| 2003 | 3 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 5 |
| 2007 | 1 | 2 |
| 2008 | 1 | 2 |
| 2009 | 2 | 4 |
| 2010 | 0 | 2 |
| 2011 | 0 | 3 |
| 2012 | 4 | 1 |
| 2013 | 1 | 4 |
| 2014 | 2 | 4 |
| 2015 | 4 | 5 |
| 2016 | 3 | 7 |
| 2017 | 3 | 8 |
| 2018 | 2 | 5 |
| 2019 | 6 | 3 |
| 2020 | 6 | 2 |
| 2021 | 4 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 3 |
| 2024 | 0 | 2 |
| 2025 | 1 | 2 |
| 2026 | 2 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing chromium-containing molten steel16 Jun 2026US 12,655,488 B2Jfe Steel Corporation
- Blowing control method for maintaining mushroom head of bottom-blowing nozzle converter10 Mar 2026US 12,571,061 B2Soochow University
- Device and method for continuous desulphurisation of liquid hot metal5 Aug 2025US 12,378,617 B2Tata Steel Nederland Technology B.V.
- Slag discharging method in process of producing ultra-low phosphorus steel and method for producing ultra-low phosphorus steel8 Aug 2023US 11,718,885 B2Nanyang Hanye Special Steel Co., Ltd
- Method for dephosphorization of hot metal, and refining agent3 Jan 2023US 11,542,566 B2Jfe Steel Corporation
- Molten steel manufacturing method and arc furnace20 Aug 2026US 2026/0242884 A1Nippon Steel Corporation
- Method for producing molten iron13 Aug 2026US 2026/0234740 A1Jfe Steel Corporation
- Granule and/or powder solid materials injection lance for injecting solid materials in the form of granules and/or powders into a metallurgical furnace23 Jul 2026US 2026/0209875 A1Tenova S. P. A.
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
- A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace12 Feb 2026US 2026/0043100 A1
Most cited
By later US patents
- Dispersing gas into molten metal131US 4,954,167 A1990
- Method of producing metals and metal alloys78US 6,267,799 B1Technological Resources Pty. Limited · 2001
- Method of producing metals and metal alloys45US 6,083,296 ATechnological Resources Pty. Limited · 2000
- Direct smelting apparatus and process39US 6,379,424 B1Technological Resources Pty. Limited · 2002
- Direct smelting process32US 6,478,848 B1Technological Resources Pty. Limited · 2002