F22B 21/08
The water tubes being arranged sectionally in groups or in banks
Official title: the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends
F22B21/08 (The water tubes being arranged sectionally in groups or in banks) appears on 12 US grants and 8 published applications in this corpus.
Search patents in F22B- Granted patents
- 12
- Published applications
- 8
- Assignees
- 11
- Inventors
- 23
- Latest grant
- 16 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 3 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- F22B 21/081Involving a combustion chamber, placed at the side and built-up from water6
- F22B 21/083Involving an upper drum and a lower drum and a fire-place between4
- F22B 21/085The tubes being placed in layers2
- F22B 21/086Frames built-up from water tubes1
- F22B 21/088Involving an upper drum and a lower drum and two lateral drums0
Recent patents
- Natural circulation multi-circulation package boiler with superheat for steam assisted gravity drainage (SAGD) process including superheat16 Aug 2022US 11,415,314 B2The Babcock & Wilcox Company
- Package boiler with tandem furnace tubes12 Apr 2022US 11,300,285 B2Superior Boiler, LLC
- Multiple pass flexible water tube boiler28 Jul 2020US 10,724,734 B2Superior Boiler, LLC
- Tube stub removal apparatus31 Jan 2012US 8,104,387 B2ALSTOM Technology Ltd
- Package water tuble boiler having two offset drums7 Jun 2005US 6,901,887 B2
- Natural circulation multi-circulation package boiler with superheat for steam assisted gravity drainage (sagd) process including superheat24 Dec 2020US 2020/0400305 A1The Babcock & Wilcox Company
- Package boiler with tandem furnace tubes22 Aug 2019US 2019/0257514 A1Superior Boiler, LLC
- Multiple Pass Flexible Water Tube Boiler8 Nov 2018US 2018/0320890 A1English Boiler, LLC
- Marine boiler structure7 Oct 2010US 2010/0251945 A1Mitsubishi Heavy Industries, Ltd.
- Reheat boiler and gas temperature controlling method of reheat boiler23 Sep 2010US 2010/0236501 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Swirl combustion apparatus16US 4,879,959 ADonlee Technologies, Inc. · 1989
- Package water tuble boiler having two offset drums6US 6,901,887 B22005
- Coal fired package boiler4US 3,971,345 ADeltak Corporation · 1976
- Water-tube boiler4US 4,170,964 AThe Trane Company · 1979
- Steam generating magnetohydrodynamic diffuser4US 4,294,199 ACombustion Engineering, Inc. · 1981