C21C 7/0645
Agents used for dephosphorising or desulfurising
Official title: {Agents used for dephosphorising or desulfurising}
C21C7/0645 (Agents used for dephosphorising or desulfurising) appears on 114 US grants and 90 published applications in this corpus.
Search patents in C21C- Granted patents
- 114
- Published applications
- 90
- Assignees
- 87
- Inventors
- 421
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 8 | 0 |
| 1984 | 6 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 2 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 5 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 2 |
| 2010 | 2 | 2 |
| 2011 | 1 | 4 |
| 2012 | 1 | 1 |
| 2013 | 2 | 4 |
| 2014 | 3 | 5 |
| 2015 | 2 | 5 |
| 2016 | 5 | 2 |
| 2017 | 4 | 5 |
| 2018 | 1 | 3 |
| 2019 | 4 | 4 |
| 2020 | 4 | 1 |
| 2021 | 1 | 6 |
| 2022 | 1 | 3 |
| 2023 | 7 | 4 |
| 2024 | 4 | 8 |
| 2025 | 3 | 5 |
| 2026 | 2 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Method for removing phosphorus from phosphorus-containing substance, method for manufacturing raw material for metal smelting or raw material for metal refining, and method for manufacturing metal24 Mar 2026US 12,584,187 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.
- Process for manufacturing a slag conditioning agent for steel desulfurization5 Aug 2025US 12,378,619 B2S. A. Lhoist Recherche et Developpement
- Cored wire for out-of-furnace treatment of metallurgical melts21 Jan 2025US 12,203,146 B2Research and Development Center Npp, Limited Liability Company
- Steel plate and method of producing same, and steel pipe or tube6 Aug 2026US 2026/0226572 A1Jfe Steel Corporation
- Steel plate and method of producing same, and steel pipe or tube9 Jul 2026US 2026/0193751 A1Jfe Steel Corporation
- Steel plate and method of producing same, and steel pipe or tube2 Jul 2026US 2026/0183815 A1Jfe Steel Corporation
- Design method for high-performance lf desulfurization refining slag2 Jul 2026US 2026/0185174 A1Beijing University of Technology
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
Most cited
By later US patents
- Addition of magnesium to molten metal24US 3,957,502 AMagnesium Elektron Limited · 1976
- Method for refining molten iron and steels19US 4,094,666 AMetal Research Corporation · 1978
- Magnesium bearing compositions for and method of steel desulfurization15US 4,279,643 AReactive Metals & Alloys Corporation · 1981
- Desulphuration of metals14US 4,209,325 AFoseco International Limited · 1980
- Product for the desulphurization of cast irons and steels14US 4,364,771 ASociete Francaise d'Electrometallurgie Sofrem · 1982