C21C 5/4613
Refractory coated lances
Official title: {Refractory coated lances; Immersion lances}
C21C5/4613 (Refractory coated lances) appears on 97 US grants and 59 published applications in this corpus.
Search patents in C21C- Granted patents
- 97
- Published applications
- 59
- Assignees
- 73
- Inventors
- 206
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 10 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 3 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 4 |
| 2007 | 0 | 4 |
| 2008 | 1 | 2 |
| 2009 | 4 | 5 |
| 2010 | 3 | 0 |
| 2011 | 1 | 2 |
| 2012 | 1 | 1 |
| 2013 | 2 | 2 |
| 2014 | 3 | 7 |
| 2015 | 2 | 5 |
| 2016 | 2 | 4 |
| 2017 | 4 | 1 |
| 2018 | 2 | 4 |
| 2019 | 2 | 1 |
| 2020 | 1 | 0 |
| 2021 | 2 | 0 |
| 2022 | 0 | 2 |
| 2023 | 2 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Blast lance for gas blowing, its use and method of production20 Jan 2026US 12,529,521 B2ImerTech SAS
- Lance unblocking method and apparatus5 Dec 2023US 11,835,296 B2Tata Steel Limited
- Lance for use in metal production and casting installations29 Aug 2023US 11,739,391 B2Vesuvius Refratarios Ltda.
- Lance unblocking method and apparatus2 Nov 2021US 11,162,733 B2Tata Steel Limited
- Method of operating a top submerged lance furnace20 Jul 2021US 11,066,713 B2Tenova South Africa (Pty) Ltd
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
- A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace29 Jan 2026US 2026/0028687 A1
- Method for manufacturing pig iron into an electrical smelting furnace and associated smelting furnace22 Jan 2026US 2026/0022428 A1
- A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace22 Jan 2026US 2026/0022429 A1
- A method for manufacturing pig iron in an electrical smelting furnace and associated smelting furnace15 Jan 2026US 2026/0015682 A1
Most cited
By later US patents
- Apparatus and method for submerged injection of a feed composition into a molten metal bath151US 5,443,572 AMolten Metal Technology, Inc. · 1995
- Oxidant lancing nozzle27US 5,580,237 APraxair Technology, Inc. · 1996
- Lance pipe for refining and method of making the same26US 4,296,921 AAikoh Co., Ltd. · 1981
- Metal refining with refractory coated pipe26US 4,783,057 ARichland Industrial, Inc. of Columbia, SC · 1988
- Refractory coating for metal25US 4,729,548 ARichland Industrial, Inc. · 1988