C21C 5/48
Bottoms or tuyéres of converters
C21C5/48 (Bottoms or tuyéres of converters) appears on 169 US grants and 61 published applications in this corpus.
Search patents in C21C- Granted patents
- 169
- Published applications
- 61
- Assignees
- 99
- Inventors
- 391
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 15 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 10 | 0 |
| 1984 | 13 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 2 |
| 2002 | 1 | 1 |
| 2003 | 4 | 5 |
| 2004 | 4 | 1 |
| 2005 | 1 | 2 |
| 2006 | 0 | 5 |
| 2007 | 1 | 5 |
| 2008 | 1 | 1 |
| 2009 | 4 | 1 |
| 2010 | 2 | 2 |
| 2011 | 2 | 5 |
| 2012 | 1 | 1 |
| 2013 | 2 | 1 |
| 2014 | 2 | 2 |
| 2015 | 2 | 6 |
| 2016 | 2 | 4 |
| 2017 | 4 | 3 |
| 2018 | 3 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 2 |
| 2021 | 1 | 2 |
| 2022 | 2 | 4 |
| 2023 | 2 | 2 |
| 2024 | 2 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Blowing control method for maintaining mushroom head of bottom-blowing nozzle converter10 Mar 2026US 12,571,061 B2Soochow University
- Refining vessel for high-temperature melt7 May 2024US 11,976,340 B2Jfe Steel Corporation
- System and method for porous plug removal and installation2 Jan 2024US 11,858,033 B2J.H. Fletcher & Co.
- Gas injection nozzle refractory and gas injection nozzle21 Nov 2023US 11,821,691 B2Jfe Steel Corporation
- Long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick6 Jun 2023US 11,667,982 B2Soochow University
- Tuyere for a metallurgical furnace1 Oct 2026US 2026/0297694 A1Paul Wurth S. A.
- Refractory gas purging plug4 Jun 2026US 2026/0151827 A1Refractory Intellectual Property GmbH & Co.KG
- Refractory gas purging plug and method for controlling the conduction of gas to a refractory gas purging plug14 May 2026US 2026/0132988 A1Refractory Intellectual Property GmbH & Co.KG
- Blowing control method for maintaining mushroom head of bottom-blowing nozzle converter14 Sep 2023US 2023/0287529 A1Soochow University
- System and method for porous plug removal and installation20 Jul 2023US 2023/0226597 A1J.H. Fletcher & Co.
Most cited
By later US patents
- Method for injecting feed streams into a molten bath112US 5,858,059 AMolten Metal Technology, Inc. · 1999
- Monolithic ceramic gas diffuser for injecting gas into a molten metal bath102US 6,199,836 B1Blasch Precision Ceramics, Inc. · 2001
- Destruction of toxic chemicals100US 4,574,714 AUnited States Steel Corporation · 1986
- Destruction of toxic organic chemicals93US 4,602,574 AUnited States Steel Corporation · 1986
- Metallurgical furnace having a blast injection nozzle25US 3,971,548 AAllmanna Svenska Elektriska Aktiebolaget · 1976