F23J 3/023
Cleaning the fireside of watertubes in boilers
Official title: {cleaning the fireside of watertubes in boilers}
F23J3/023 (Cleaning the fireside of watertubes in boilers) appears on 86 US grants and 93 published applications in this corpus.
Search patents in F23J- Granted patents
- 86
- Published applications
- 93
- Assignees
- 72
- Inventors
- 198
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 5 |
| 2003 | 3 | 3 |
| 2004 | 4 | 5 |
| 2005 | 2 | 1 |
| 2006 | 1 | 4 |
| 2007 | 0 | 2 |
| 2008 | 3 | 5 |
| 2009 | 1 | 7 |
| 2010 | 3 | 5 |
| 2011 | 3 | 9 |
| 2012 | 5 | 7 |
| 2013 | 8 | 6 |
| 2014 | 4 | 6 |
| 2015 | 2 | 5 |
| 2016 | 4 | 3 |
| 2017 | 1 | 0 |
| 2018 | 2 | 3 |
| 2019 | 2 | 2 |
| 2020 | 1 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 7 |
| 2023 | 4 | 1 |
| 2024 | 0 | 1 |
| 2025 | 4 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and methods for controlling operation of a recovery boiler to reduce fouling1 Jul 2025US 12,345,410 B2International Paper Company
- Heat exchanger tube block, exhaust heat recovery boiler, and method of constructing exhaust heat recovery boiler24 Jun 2025US 12,339,077 B2Kawasaki Jukogyo Kabushiki Kaisha
- Device and method for producing pressure waves of high amplitude22 Apr 2025US 12,281,791 B2Explo Engineering GmbH
- Waste heat recovery system and method21 Jan 2025US 12,203,650 B2Samsung E&A Co., Ltd.
- Exhaust heat recovery boiler31 Oct 2023US 11,802,744 B2Kawasaki Jukogyo Kabushiki Kaisha
- Telescopic Pulse Ash Blower Capable of Blowing Ash at Multiple Angles and Ash Blowing Method Thereof18 Jun 2026US 2026/0168668 A1Harbin Xiandai Intelligent Equipment Manufacturing Co., Ltd.
- Protective Device for a Boiler Access Point9 Jan 2025US 2025/0012301 A1Explo Engineering GmbH
- Waste heat recovery system and method19 Dec 2024US 2024/0418360 A1Samsung E&A Co., Ltd.
- System and methods for controlling operation of a recovery boiler to reduce fouling27 Apr 2023US 2023/0131798 A1International Paper Company
- Biomass heating system, as well as its components27 Oct 2022US 2022/0341625 A1Sl-Technik GmbH
Most cited
By later US patents
- Economizer with soot blower59US 4,407,237 AApplied Engineering Co. · 1983
- Method and system for sootblowing optimization42US 6,736,089 B1NeuCo, Inc. · 2004
- Sootblowing optimization system37US 6,325,025 B1Applied Synergistics, Inc. · 2001
- Sootblowing optimization system29US 6,425,352 B22002
- Pulse combustion system for boilers25US 4,368,677 A1983