F22B 21/345
With a tube bundle between an upper and a lower drum in
Official title: {with a tube bundle between an upper and a lower drum in the convection pass}
F22B21/345 (With a tube bundle between an upper and a lower drum in) appears on 11 US grants and 7 published applications in this corpus.
Search patents in F22B- Granted patents
- 11
- Published applications
- 7
- Assignees
- 6
- Inventors
- 21
- Latest grant
- 28 Jul 2020
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 | 0 | 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 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 3 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Multiple pass flexible water tube boiler28 Jul 2020US 10,724,734 B2Superior Boiler, LLC
- Continuous flow steam generator with a two-pass boiler design6 Jun 2017US 9,671,105 B2Siemens Aktiengesellschaft
- Water cooled CO boiler floor with screen gas distribution inlet7 Mar 2017US 9,587,827 B2The Babcock & Wilcox Company
- Once-through steam generator21 Feb 2017US 9,574,766 B2Siemens Aktiengesellschaft
- M-type pulverized coal boiler suitable for ultrahigh steam temperature9 Dec 2014US 8,904,790 B2Huaneng Clean Energy Research Institute
- Multiple Pass Flexible Water Tube Boiler8 Nov 2018US 2018/0320890 A1English Boiler, LLC
- Continuous flow steam generator with a two-pass boiler design23 Jun 2016US 2016/0178188 A1Siemens Aktiengesellschaft
- Once-through steam generator23 Jun 2016US 2016/0178190 A1Siemens Aktiengesellschaft
- Water cooled co boiler floor with screen gas distribution inlet24 Jul 2014US 2014/0202400 A1The Babcock & Wilcox Company
- M-type pulverized coal boiler suitable for ultrahigh steam temperature6 Feb 2014US 2014/0033712 A1Huaneng Clean Energy Research Institute
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
- Reducing heat transfer surface area requirements of direct fired heaters without decreasing run length5US 7,395,785 B12008
- Integral economizer steam generator2US 4,342,286 ACombustion Engineering, Inc. · 1982
- Upflow/downflow heated tube circulating system1US 4,982,703 AThe Babcock & Wilcox Company · 1991