C21B 9/02
Brick hot-blast stoves
C21B9/02 (Brick hot-blast stoves) appears on 44 US grants and 26 published applications in this corpus.
Search patents in C21B- Granted patents
- 44
- Published applications
- 26
- Assignees
- 28
- Inventors
- 110
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 4 |
| 2011 | 0 | 1 |
| 2012 | 0 | 6 |
| 2013 | 4 | 0 |
| 2014 | 1 | 0 |
| 2015 | 2 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 2 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Support assembly in a heat storage device17 Mar 2026US 12,578,144 B2Paul Wurth Deutschland GmbH
- Method for monitoring the wear of a refractory lining of a blast furnace8 Apr 2025US 12,270,606 B2ArcelorMittal
- Method for protecting an inner wall of a shaft furnace25 Feb 2025US 12,235,047 B2Paul Wurth S. A.
- Top combustion stove12 Oct 2021US 11,142,804 B2Paul Wurth Deutschland GmbH
- Combustion chamber wall and a method of manufacturing a combustion chamber wall16 Apr 2019US 10,260,749 B2ROLLS-ROYCE plc
- Combustion control method and combustion control device for hot blast stove18 Jun 2026US 2026/0168451 A1Jfe Steel Corporation
- Interlocking refractory bricks and refractory layer structures formed therewith31 Jul 2025US 2025/0243101 A1HarbisonWalker International Holdings, Inc.
- Refractory layer structures and assemblies for vessels exposed to molten materials31 Jul 2025US 2025/0244077 A1HarbisonWalker International Holdings, Inc.
- Electric stove12 Dec 2024US 2024/0410616 A1Paul Wurth S. A.
- Support assembly in a heat storage device30 Nov 2023US 2023/0384035 A1Paul Wurth Deutschland GmbH
Most cited
By later US patents
- Pressure responsive tilt valve for pressurized container15US 4,171,074 A1979
- Swing scaffold for hot blast stove checker chamber relining11US 4,276,956 AAndco Incorporated · 1981
- Ceramic burner for combustion chamber for hot-blast stove9US 4,086,052 ADidier-Werke AG · 1978
- Method for reducing stress corrosion cracking in high-temperature regenerative air heaters9US 4,444,555 AKoppers Company, Inc. · 1984
- Hot blast stove erection process7US 4,221,537 AAndco Incorporated · 1980