F22B 21/40
Built-up from water tubes arranged in a comparatively long vertical shaft, i.e.
Official title: built-up from water tubes arranged in a comparatively long vertical shaft, i.e. tower boilers
F22B21/40 (Built-up from water tubes arranged in a comparatively long vertical shaft, i.e.) appears on 9 US grants and 6 published applications in this corpus.
Search patents in F22B- Granted patents
- 9
- Published applications
- 6
- Assignees
- 5
- Inventors
- 24
- Latest grant
- 11 May 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Pipeline connection system for steam turbine and boiler combination11 May 2021US 11,002,155 B2
- Method of reducing flue gas emissions and a boiler15 Oct 2019US 10,443,839 B2Andritz Inc.
- Chemical recovery boiler16 Apr 2019US 10,260,744 B2Valmet Technologies Oy
- Method of reducing flue gas emissions and a boiler12 Apr 2016US 9,310,075 B2Andritz Inc.
- Combustion controller3 Mar 2015US 8,967,996 B2Mitsubishi Heavy Industries, Ltd.
- Green steam industrial steam generator process and system4 Jan 2024US 2024/0003532 A1
- Pipeline connection system for steam turbine and boiler combination30 Apr 2020US 2020/0131941 A1
- Chemical recovery boiler28 Jun 2018US 2018/0180284 A1Valmet Technologies Oy
- Method of reducing flue gas emissions and a boiler25 Aug 2016US 2016/0245510 A1Andritz Inc.
- Method of reducing flue gas emissions and a boiler26 Jul 2012US 2012/0186541 A1Andritz Inc.
Most cited
By later US patents
- High-efficiency furnace11US 5,394,837 A1995
- Process furnace9US 5,878,699 AThe M. W. Kellogg Company · 1999
- Drop down corbelling (LAW029)4US 5,437,247 AExxon Research & Engineering Co. · 1995
- Method of reducing flue gas emissions and a boiler3US 9,310,075 B2Andritz Inc. · 2016
- Furnace radiant sections with vertical heat exchanger tubing, and convection section1US 5,005,530 A1991