C21C 5/28
Manufacture of steel in the converter
Official title: Manufacture of steel in the converter {(C21C5/005 takes precedence)}
C21C5/28 (Manufacture of steel in the converter) appears on 1,636 US grants and 791 published applications in this corpus.
Search patents in C21C- Granted patents
- 1,636
- Published applications
- 791
- Assignees
- 675
- Inventors
- 3,217
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 57 | 0 |
| 1977 | 67 | 0 |
| 1978 | 65 | 0 |
| 1979 | 33 | 0 |
| 1980 | 53 | 0 |
| 1981 | 62 | 0 |
| 1982 | 48 | 0 |
| 1983 | 66 | 0 |
| 1984 | 63 | 0 |
| 1985 | 47 | 0 |
| 1986 | 33 | 0 |
| 1987 | 41 | 0 |
| 1988 | 57 | 0 |
| 1989 | 32 | 0 |
| 1990 | 39 | 0 |
| 1991 | 35 | 0 |
| 1992 | 26 | 0 |
| 1993 | 27 | 0 |
| 1994 | 40 | 0 |
| 1995 | 27 | 0 |
| 1996 | 29 | 0 |
| 1997 | 13 | 0 |
| 1998 | 30 | 0 |
| 1999 | 36 | 0 |
| 2000 | 34 | 0 |
| 2001 | 40 | 11 |
| 2002 | 29 | 15 |
| 2003 | 29 | 33 |
| 2004 | 21 | 29 |
| 2005 | 15 | 21 |
| 2006 | 8 | 31 |
| 2007 | 9 | 37 |
| 2008 | 14 | 31 |
| 2009 | 23 | 31 |
| 2010 | 23 | 29 |
| 2011 | 25 | 53 |
| 2012 | 32 | 32 |
| 2013 | 25 | 29 |
| 2014 | 30 | 31 |
| 2015 | 21 | 29 |
| 2016 | 22 | 40 |
| 2017 | 28 | 31 |
| 2018 | 19 | 24 |
| 2019 | 26 | 23 |
| 2020 | 25 | 27 |
| 2021 | 14 | 20 |
| 2022 | 13 | 39 |
| 2023 | 21 | 32 |
| 2024 | 22 | 50 |
| 2025 | 17 | 30 |
| 2026 | 25 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Blast furnace—converter steel production method based on carbon cycling28 Jul 2026US 12,692,561 B2Cisdi Engineering Co., Ltd
- Electric induction heating and melting furnace refractory life cycle wear imaging and processing28 Jul 2026US 12,692,564 B2Inductotherm Corp.
- Self-adaptive hanging structure of converter28 Jul 2026US 12,692,565 B2
- Tilting ladle carrier28 Jul 2026US 12,692,566 B2Edw. C. Levy Co.
- Lance for blowing oxygen in steelmaking21 Jul 2026US 12,686,894 B2ArcelorMittal
- Tuyere for a metallurgical furnace1 Oct 2026US 2026/0297694 A1Paul Wurth S. A.
- Production and preparation method of carburized gear shaft bars by means of converter process24 Sep 2026US 2026/0286458 A1Bengang Steel Plates Co., Ltd.
- Methods and systems for low-slag efficient smelting based on submerged supersonic gas-solid injection17 Sep 2026US 2026/0275436 A1University of Science and Technology Beijing
- Method for manufacturing pig iron in a production line comprising an electrical smelting furnace10 Sep 2026US 2026/0265850 A1
- Systematic carbon emissions reduction method for whole process of production and casting3 Sep 2026US 2026/0258513 A1Jiqing Low Carbon Technology (Qinhuangdao) Co., Ltd.
Most cited
By later US patents
- Probe for taking gas samples and heat measurements in a shaft furnace485US 5,108,192 APaul Wurth S. A. · 1992
- Apparatus and method for submerged injection of a feed composition into a molten metal bath151US 5,443,572 AMolten Metal Technology, Inc. · 1995
- Universal coupling117US 6,358,467 B1Metaullics Systems Co., L.P. · 2002
- Method for treating organic waste116US 5,537,940 AMolten Metal Technology, Inc. · 1996
- Method for top-charging solid waste into a molten metal bath115US 5,491,279 AMolten Metal Technology, Inc. · 1996