C21B 9/14
Preheating the combustion air
C21B9/14 (Preheating the combustion air) appears on 20 US grants and 22 published applications in this corpus.
Search patents in C21B- Granted patents
- 20
- Published applications
- 22
- Assignees
- 21
- Inventors
- 56
- Latest grant
- 12 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 4 |
| 2015 | 2 | 1 |
| 2016 | 1 | 3 |
| 2017 | 2 | 1 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 3 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Top combustion stove12 Oct 2021US 11,142,804 B2Paul Wurth Deutschland GmbH
- Method for operating a top gas recycling blast furnace installation11 Sep 2018US 10,072,312 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and apparatus for supplying blast to a blast furnace16 Jan 2018US 9,868,998 B2Primetals Technologies, Limited
- Selective oxy-fuel boost burner system and method for a regenerative furnace23 May 2017US 9,657,945 B2Air Products and Chemicals, Inc.
- Exhaust processing and heat recovery system21 Mar 2017US 9,598,742 B2Arvos GmbH
- Combustion control method and combustion control device for hot blast stove18 Jun 2026US 2026/0168451 A1Jfe Steel Corporation
- Electric stove12 Dec 2024US 2024/0410616 A1Paul Wurth S. A.
- Method for operating a blast furnace installation8 Aug 2024US 2024/0263258 A1Paul Wurth S. A.
- Method for producing pig iron in a shaft furnace18 Jan 2024US 2024/0018615 A1ThyssenKrupp Steel Europe AG
- Top combustion stove29 Nov 2018US 2018/0340237 A1Paul Wurth Refractory & Engineering GmbH
Most cited
By later US patents
- Air preheating system for continuous fired furnace7US 4,666,403 AMorgan Construction Company · 1987
- Method for recovery and recycling of heat from hot gases in metallurigical processing5US 4,434,004 AMannesmann Demag AG · 1984
- Method of blast heating5US 4,452,586 AKrupp-Koppers GmbH · 1984
- Process and apparatus for preheating the combustion mediums used for firing blast furnace stoves4US 4,492,568 ADidier-Werke AG · 1985
- Method and apparatus for recovery and recycling of heat from hot gases4US 4,541,864 AMannesmann Demag AG · 1985