C21C 5/40
Offtakes or separating apparatus for converter waste gases or dust
C21C5/40 (Offtakes or separating apparatus for converter waste gases or dust) appears on 89 US grants and 34 published applications in this corpus.
Search patents in C21C- Granted patents
- 89
- Published applications
- 34
- Assignees
- 57
- Inventors
- 201
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 11 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 9 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 2 |
| 2012 | 3 | 3 |
| 2013 | 1 | 4 |
| 2014 | 2 | 2 |
| 2015 | 1 | 0 |
| 2016 | 2 | 4 |
| 2017 | 0 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 3 | 3 |
| 2021 | 1 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 5 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Steel making plant with electric arc furnace21 Apr 2026US 12,607,409 B2SMS group GmbH
- Dry dust removal from furnace gas26 Jul 2022US 11,397,051 B2Danieli Corus B.V.
- Melting apparatus for the production of steel24 May 2022US 11,338,362 B2Danieli & C. Officine Meccaniche SpA
- Efficient long-service-life blowing method and system for vanadium extraction-decarburization duplex converters27 Apr 2021US 10,988,818 B2University of Science and Technology Beijing
- Combined system for producing steel and method for operating the combined system22 Sep 2020US 10,781,498 B2thyssenkrupp AG
- Metallurgical plant and method28 Aug 2025US 2025/0271216 A1Danieli & C. Officine Meccaniche SpA
- Process for reducing fossil co2 emissions17 Jul 2025US 2025/0229224 A1Paul Wurth S. A.
- Half pipe heat exchange system for electric arc, metallurgical or refining furnaces and system thereof10 Jul 2025US 2025/0224179 A1Amerifab, Inc.
- Method and device for treating primary gas from a metallurgical vessel22 May 2025US 2025/0161871 A1SMS group GmbH
- Steelmaking method and associated network of plants30 Jan 2025US 2025/0034668 A1
Most cited
By later US patents
- Pipe curtain for pollution control hood45US 4,245,820 AWheeling-Pittsburgh Steel Corporation · 1981
- Method of cleaning gas from solid and gaseous matter and apparatus materializing same25US 4,957,512 A1990
- Apparatus for collecting and conveying of fumes from a furnace15US 4,031,819 AAmerican Air Filter Company, Inc. · 1977
- Liquid cooling arrangement for industrial furnaces15US 4,443,188 ABBC Brown, Boveri & Company, Limited · 1984
- Method for transferring heat to molten metal, and apparatus therefor9US 4,740,242 ANippon Kokan Kabushiki Kaisha · 1988