C21C 7/0075
Treating in a ladle furnace
Official title: {Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle}
C21C7/0075 (Treating in a ladle furnace) appears on 126 US grants and 142 published applications in this corpus.
Search patents in C21C- Granted patents
- 126
- Published applications
- 142
- Assignees
- 106
- Inventors
- 503
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 3 |
| 2004 | 1 | 4 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 2 | 6 |
| 2009 | 0 | 3 |
| 2010 | 3 | 5 |
| 2011 | 2 | 5 |
| 2012 | 5 | 3 |
| 2013 | 3 | 3 |
| 2014 | 0 | 3 |
| 2015 | 2 | 5 |
| 2016 | 4 | 11 |
| 2017 | 4 | 4 |
| 2018 | 4 | 5 |
| 2019 | 5 | 8 |
| 2020 | 4 | 7 |
| 2021 | 5 | 2 |
| 2022 | 1 | 4 |
| 2023 | 7 | 9 |
| 2024 | 5 | 7 |
| 2025 | 14 | 25 |
| 2026 | 4 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Ultra-high phosphorus molten iron low-cost smelting method for polar steel21 Apr 2026US 12,606,877 B2Laiwu Steel Yinshan Section Co., Ltd.
- Methods for producing alloy tools17 Mar 2026US 12,577,644 B2Changzhou Zenith Special Steel Co., Ltd.
- Molten steel refining method20 Jan 2026US 12,529,116 B2Jfe Steel Corporation
- Hot-rolled, low-temperature-resistant, H-shaped steel with grade of yield strength of 420 MPa and preparation method therefor23 Dec 2025US 12,503,738 B2Shandong Iron and Steel Company Ltd.
- Novel process for the smelting of a metalliferous feedstock material yielding reduced carbon emissions1 Oct 2026US 2026/0297698 A1Metix (Proprietary) Limited
- Apparatus and method for refining liquid metal24 Sep 2026US 2026/0284739 A1Danieli & C. Officine Meccaniche SpA
- Steel strip for battery case and method for producing steel strip20 Aug 2026US 2026/0241441 A1Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co., Ltd.
- System to produce green steel through electric arc furnace with very low ghg emission intensity16 Jul 2026US 2026/0201487 A1Saarloha Advanced Materials Private Limited
- Ni-cr-fe-mo alloys with excellent surface properties and their production methods28 May 2026US 2026/0146308 A1Nippon Yakin Kogyo Co., Ltd.
Most cited
By later US patents
- Hooded metallurgical vessel36US 4,648,584 AMannesmann Aktiengesellschaft · 1987
- Method and apparatus for heating molten steel utilizing a plasma arc torch36US 4,918,282 APlasma Energy Corporation · 1990
- Process and additive for the ladle refining of steel25US 5,397,379 AOglebay Norton Company · 1995
- Method for the refining of iron-based melts19US 4,200,452 ADSO "Cherna Metalurgia" · 1980
- Molten metal heating, stirring and casting apparatus14US 4,336,411 AASEA Aktibolag · 1982