F22B 31/08
Installation of heat-exchange apparatus or of means in boilers for heating air
Official title: Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
F22B31/08 (Installation of heat-exchange apparatus or of means in boilers for heating air) appears on 27 US grants and 19 published applications in this corpus.
Search patents in F22B- Granted patents
- 27
- Published applications
- 19
- Assignees
- 28
- Inventors
- 68
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 2 |
| 2017 | 2 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 4 |
| 2020 | 1 | 0 |
| 2021 | 2 | 0 |
| 2022 | 2 | 3 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
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- Condensing, ultra-low NOx gas-fired humidifier26 Mar 2024US 11,940,178 B2DRI-STEEM Corporation
- Condensing, ultra-low NOx gas-fired humidifier23 Aug 2022US 11,421,899 B2DRI-STEEM Corporation
- Combustion system incorporating temperature swing adsorptive gas separation18 Jan 2022US 11,224,834 B2Svante Inc.
- Heat exchanger, boiler, and setting method for heat exchanger23 Mar 2021US 10,955,201 B2Mitsubishi Power, 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
- Condensing, Ultra-Low NOx Gas-Fired Humidifier9 Jan 2025US 2025/0012462 A1DRI-STEEM Corporation
- Gas-fired steam-injection boiler for oil field24 Oct 2024US 2024/0353095 A1China Petroleum & Chemical Corporation
- Condensing, Ultra-Low NOx Gas-Fired Humidfier22 Dec 2022US 2022/0404041 A1DRI-STEEM Corporation
Most cited
By later US patents
- Retrofit equipment for reducing the consumption of fossil fuel by a power plant using solar insolation60US 6,321,539 B1Ormat Industries Ltd. · 2001
- Retrofit equipment for reducing the consumption of fossil fuel by a power plant using solar insolation40US 6,237,337 B1Ormat Industries Ltd. · 2001
- Retrofit equipment for reducing the consumption of fossil fuel by a power plant using solar insolation29US 6,694,738 B2Ormat Industries Ltd. · 2004
- Fuel firing23US 4,223,640 AThe Babcock & Wilcox Company · 1980
- Chemical process fired heaters, furnaces or boilers21US 4,784,069 AFoster Wheeler USA Corporation · 1988