C21C 1/02
Dephosphorising or desulfurising
C21C1/02 (Dephosphorising or desulfurising) appears on 228 US grants and 88 published applications in this corpus.
Search patents in C21C- Granted patents
- 228
- Published applications
- 88
- Assignees
- 133
- Inventors
- 490
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 6 | 0 |
| 1978 | 11 | 0 |
| 1979 | 10 | 0 |
| 1980 | 16 | 0 |
| 1981 | 9 | 0 |
| 1982 | 14 | 0 |
| 1983 | 13 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 9 | 0 |
| 1987 | 6 | 0 |
| 1988 | 10 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 2 |
| 2003 | 3 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 6 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 3 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 3 |
| 2014 | 3 | 7 |
| 2015 | 3 | 6 |
| 2016 | 5 | 1 |
| 2017 | 4 | 6 |
| 2018 | 3 | 1 |
| 2019 | 2 | 0 |
| 2020 | 1 | 3 |
| 2021 | 1 | 3 |
| 2022 | 2 | 4 |
| 2023 | 4 | 4 |
| 2024 | 2 | 12 |
| 2025 | 5 | 5 |
| 2026 | 4 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Converter steelmaking method23 Jun 2026US 12,662,712 B2Jfe Steel Corporation
- Method for manufacturing low-phosphorus molten steel9 Jun 2026US 12,649,955 B2Jfe Steel Corporation
- Production method for non-oriented silicon steel and non-oriented silicon steel31 Mar 2026US 12,590,351 B2Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn) China
- Molten iron dephosphorization method24 Mar 2026US 12,584,183 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.
- Method for manufacturing pig iron in a production line comprising an electrical smelting furnace10 Sep 2026US 2026/0265850 A1
- A method for manufacturing pig iron in a production line comprising an electrical smelting furnace3 Sep 2026US 2026/0258516 A1
- Molten iron dephosphorization method2 Jul 2026US 2026/0185173 A1Jfe Steel Corporation
- Method for producing metallic iron25 Jun 2026US 2026/0176707 A1Jef Steel Corporation
- Sulfur management in a smelting process21 May 2026US 2026/0139336 A1Nucor Corporation
Most cited
By later US patents
- Immersion and vaporization chamber107US 4,496,393 AGeorge Fischer Ltd. · 1985
- Desulfurization method57US 3,998,625 AJones & Laughlin Steel Corporation · 1976
- Method of treating and breaking up a liquid with the help of centripetal force25US 4,618,427 AArdal og Sundal Verk a.s. · 1986
- Desulphurization of an iron melt24US 4,139,369 AHoechst Aktiengesellschaft · 1979
- Metallurgical lances23US 3,976,286 AGR-Stein Refractories Limited · 1976