F22B 37/008
Adaptations for flue-gas purification in steam generators
Official title: {Adaptations for flue-gas purification in steam generators}
F22B37/008 (Adaptations for flue-gas purification in steam generators) appears on 63 US grants and 67 published applications in this corpus.
Search patents in F22B- Granted patents
- 63
- Published applications
- 67
- Assignees
- 48
- Inventors
- 165
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 1 |
| 2003 | 2 | 2 |
| 2004 | 2 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 1 | 8 |
| 2011 | 2 | 13 |
| 2012 | 2 | 7 |
| 2013 | 2 | 5 |
| 2014 | 6 | 6 |
| 2015 | 2 | 1 |
| 2016 | 2 | 1 |
| 2017 | 2 | 1 |
| 2018 | 1 | 5 |
| 2019 | 5 | 1 |
| 2020 | 0 | 0 |
| 2021 | 2 | 5 |
| 2022 | 1 | 2 |
| 2023 | 0 | 1 |
| 2024 | 4 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- System and methods for controlling operation of a recovery boiler to reduce fouling1 Jul 2025US 12,345,410 B2International Paper Company
- Method and system for improving boiler effectiveness27 Aug 2024US 12,072,096 B2Arvos Ljungstrom LLC
- Boiler flushing25 Jun 2024US 12,018,595 B2Siemens Energy Global GmbH & Co. KG
- Boiler16 Apr 2024US 11,959,638 B2IHI Corporation
- Boiler23 Jan 2024US 11,879,638 B2IHI Corporation
- System and methods for controlling operation of a recovery boiler to reduce fouling27 Apr 2023US 2023/0131798 A1International Paper Company
- Boiler flushing8 Dec 2022US 2022/0389843 A1Siemens Energy Global GmbH & Co. KG
- Method and arrangement19 May 2022US 2022/0154974 A1
- System and methods for controlling operation of a recovery boiler to reduce fouling4 Nov 2021US 2021/0341140 A1International Paper Company
- System and Method for a Direct Emission and Diffusion of High-Pressure Combustion with Exhaust into Feed-Water from a Combustion Barrel30 Sep 2021US 2021/0302019 A1
Most cited
By later US patents
- Waste heat recovery system45US 4,875,436 AW. R. Grace & Co.-Conn. · 1989
- Combined heat recovery and emission control system44US 4,572,110 AEnergy Services Inc. · 1986
- Reheating flue gas for selective catalytic systems36US 5,943,865 A1999
- Apparatus for removing NOx and for providing better plant efficiency in simple cycle combustion turbine plants34US 4,353,207 AWestinghouse Electric Corp. · 1982
- Waste heat recovery boiler25US 4,466,241 AHitachi, Ltd. · 1984