F22B 21/341
Vertical radiation boilers with combustion in the lower part
Official title: {Vertical radiation boilers with combustion in the lower part}
F22B21/341 (Vertical radiation boilers with combustion in the lower part) appears on 31 US grants and 29 published applications in this corpus.
Search patents in F22B- Granted patents
- 31
- Published applications
- 29
- Assignees
- 19
- Inventors
- 65
- Latest grant
- 25 May 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 3 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 2 | 3 |
| 2015 | 2 | 1 |
| 2016 | 2 | 5 |
| 2017 | 5 | 3 |
| 2018 | 1 | 2 |
| 2019 | 5 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Solid fuel burning-furnace having a vertically mounted cylindrical combustion chamber25 May 2021US 11,015,800 B2Sullivan, Higgins, and Brion PPE, LLC
- Multiple pass flexible water tube boiler28 Jul 2020US 10,724,734 B2Superior Boiler, LLC
- Method of reducing flue gas emissions and a boiler15 Oct 2019US 10,443,839 B2Andritz Inc.
- Boiler25 Jun 2019US 10,330,309 B2Mitsubishi Hitachi Power Systems, Ltd.
- Method and device for producing superheated steam by means of the heat produced in the boiler of an incineration plant16 Apr 2019US 10,260,740 B2Hitachi Zosen Inova AG
- Processes and apparatuses for heating a process fluid27 Feb 2025US 2025/0067516 A1Uop LLC
- Heat Exchanger Element and Use Thereof30 Jan 2025US 2025/0035302 A1Andritz Technology and Asset Management GmbH
- Solid fuel burning-furnace having a vertically mounted cylindrical combustion chamber31 Oct 2019US 2019/0331335 A1Sullivan, Higgins, and Brion PPE, LLC
- Multiple Pass Flexible Water Tube Boiler8 Nov 2018US 2018/0320890 A1English Boiler, LLC
- Boiler15 Feb 2018US 2018/0045402 A1Mitsubishi Hitachi Power Systems, Ltd.
Most cited
By later US patents
- Upflow/downflow heated tube circulating system18US 5,201,282 AThe Babcock & Wilcox Company · 1993
- Single drum all-welded boiler13US 4,442,800 AThe Babcock & Wilcox Company · 1984
- Boiler8US 5,950,574 ABabcock-Hitachi Kabushiki Kaisha · 1999
- Drumless natural circulation boiler8US 6,336,429 B12002
- Reducing heat transfer surface area requirements of direct fired heaters without decreasing run length5US 7,395,785 B12008