C21B 7/18
Bell-and-hopper arrangements
C21B7/18 (Bell-and-hopper arrangements) appears on 156 US grants and 79 published applications in this corpus.
Search patents in C21B- Granted patents
- 156
- Published applications
- 79
- Assignees
- 51
- Inventors
- 213
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 11 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 0 |
| 2003 | 3 | 2 |
| 2004 | 2 | 3 |
| 2005 | 3 | 2 |
| 2006 | 1 | 2 |
| 2007 | 2 | 2 |
| 2008 | 0 | 7 |
| 2009 | 1 | 5 |
| 2010 | 2 | 6 |
| 2011 | 6 | 10 |
| 2012 | 4 | 9 |
| 2013 | 8 | 2 |
| 2014 | 6 | 4 |
| 2015 | 6 | 3 |
| 2016 | 3 | 0 |
| 2017 | 1 | 4 |
| 2018 | 3 | 4 |
| 2019 | 2 | 2 |
| 2020 | 3 | 1 |
| 2021 | 2 | 5 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 2 | 4 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Blast furnace distributing device with nitrogen sealing structure4 Aug 2026US 12,698,540 B2
- Method for operating a blast furnace plant23 Jun 2026US 12,663,212 B2Paul Wurth S. A.
- Method for charging raw materials into blast furnace24 Sep 2024US 12,098,437 B2Jfe Steel Corporation
- Blast furnace apparatus and operation method for blast furnace26 Mar 2024US 11,940,215 B2Jfe Steel Corporation
- Method for charging raw materials into blast furnace20 Jun 2023US 11,680,748 B2Jfe Steel Corporation
- System and method for distributing loads in a metal furnace2 Jan 2025US 2025/0003683 A1Tecnored Desenvolvimento TecnolóGico S/A
- Feed trough, method of feed trough fabrication, and feeder and system including feed trough11 Apr 2024US 2024/0118031 A1General Kinematics Corporation
- Method for operating a blast furnace plant7 Mar 2024US 2024/0077255 A1Paul Wurth S. A.
- Method for charging raw materials into blast furnace15 Feb 2024US 2024/0052439 A1Jfe Steel Corporation
- Improved blast furnace distributing device with nitrogen sealing structure4 Jan 2024US 2024/0002963 A1Cisdi Engineering Co., Ltd
Most cited
By later US patents
- Furnace charging installation25US 4,514,129 APaul Wurth S. A. · 1985
- Distributor means for charging particulate material into receptacles24US 4,029,220 A1977
- Method of and apparatus for charging a furnace22US 4,243,351 APaul Wurth S. A. · 1981
- Blast furnace charging method and apparatus21US 4,071,166 AS. A. des Anciens Etablissements Paul Wurth · 1978
- Apparatus for charging a shaft furnace19US 5,022,806 APaul Wurth S. A. · 1991