F22B 31/00
Modifications of boiler construction, or of tube systems, dependent on installation of
Official title: Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
F22B31/00 (Modifications of boiler construction, or of tube systems, dependent on installation of) appears on 614 US grants and 185 published applications in this corpus.
Search patents in F22B- Granted patents
- 614
- Published applications
- 185
- Assignees
- 235
- Inventors
- 931
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 14 | 0 |
| 1979 | 10 | 0 |
| 1980 | 14 | 0 |
| 1981 | 21 | 0 |
| 1982 | 17 | 0 |
| 1983 | 12 | 0 |
| 1984 | 37 | 0 |
| 1985 | 23 | 0 |
| 1986 | 15 | 0 |
| 1987 | 23 | 0 |
| 1988 | 27 | 0 |
| 1989 | 32 | 0 |
| 1990 | 27 | 0 |
| 1991 | 27 | 0 |
| 1992 | 23 | 0 |
| 1993 | 20 | 0 |
| 1994 | 24 | 0 |
| 1995 | 15 | 0 |
| 1996 | 15 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 15 | 0 |
| 2000 | 10 | 0 |
| 2001 | 20 | 3 |
| 2002 | 9 | 10 |
| 2003 | 6 | 5 |
| 2004 | 7 | 3 |
| 2005 | 2 | 8 |
| 2006 | 2 | 6 |
| 2007 | 2 | 4 |
| 2008 | 1 | 2 |
| 2009 | 2 | 14 |
| 2010 | 2 | 9 |
| 2011 | 6 | 5 |
| 2012 | 5 | 8 |
| 2013 | 4 | 7 |
| 2014 | 6 | 6 |
| 2015 | 9 | 5 |
| 2016 | 7 | 14 |
| 2017 | 12 | 13 |
| 2018 | 12 | 11 |
| 2019 | 15 | 12 |
| 2020 | 3 | 10 |
| 2021 | 11 | 8 |
| 2022 | 7 | 8 |
| 2023 | 7 | 3 |
| 2024 | 6 | 5 |
| 2025 | 4 | 4 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F22B 31/0007Modifications of boiler construction, or of tube systems, dependent on installation of446
- F22B 31/04Heat supply by installation of two or more combustion apparatus84
- F22B 31/08Installation of heat-exchange apparatus or of means in boilers for heating air27
- F22B 31/02Installation of water-tube boilers in chimneys2
Recent patents
- Method for heating a heat exchange medium in a fluidized bed boiler, a fluidized bed boiler, and a loopseal heat exchanger30 Dec 2025US 12,510,241 B2Valmet Technologies Oy
- Induced circulation among integrated bubbling zones14 Oct 2025US 12,440,818 B2
- Integrated steam generator and superheater with process gas in ammonia synloop15 Jul 2025US 12,358,803 B2Kellogg Brown & Root LLC
- 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
- Fuel supply device of circulating fluidized bed boiler16 Jul 2024US 12,038,171 B2Hyundai Heavy Industries Power Systems Co., Ltd.
- Electric energy generation from waste heat with heat transfer fluid pipes16 Apr 2026US 2026/0103631 A1Enover Isi Sistemleri Anonim Sirketi
- Arrangement for supporting boiler2 Apr 2026US 2026/0092700 A1Valmet Technologies Oy
- Method for Preparing Steam Using Waste Heat3 Jul 2025US 2025/0216068 A1LG Chem.Ltd.
- System and Method for Combusting High-Moisture Fuel to Generate Steam1 May 2025US 2025/0137637 A1Air Products and Chemicals, Inc.
- Heat Exchanger Element and Use Thereof30 Jan 2025US 2025/0035302 A1Andritz Technology and Asset Management GmbH
Most cited
By later US patents
- Oxygen fired circulating fluidized bed steam generator105US 6,505,567 B1Alstom (Switzerland) Ltd · 2003
- Process for burning carbonaceous materials94US 4,165,717 AMetallgesellschaft Aktiengesellschaft · 1979
- Method and device for controlling the temperature of a reaction carried out in a fluidized bed75US 4,552,203 ACreusot-Loire · 1985
- Two stage circulating fluidized bed reactor and method of operating the reactor72US 4,688,521 ADonlee Technologies, Inc. · 1987
- Supplying heat to an externally fired power system66US 5,588,298 AExergy S.P.A. · 1996