F22B 29/06
Steam boilers of forced-flow type: of once-through type, i.e. built-up from tubes
Official title: of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes (combined low- and high-pressure boilers of forced-flow type F22B33/16)
F22B29/06 (Steam boilers of forced-flow type: of once-through type, i.e. built-up from tubes) appears on 232 US grants and 219 published applications in this corpus.
Search patents in F22B- Granted patents
- 232
- Published applications
- 219
- Assignees
- 92
- Inventors
- 364
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 3 |
| 2007 | 1 | 7 |
| 2008 | 2 | 2 |
| 2009 | 3 | 4 |
| 2010 | 0 | 5 |
| 2011 | 3 | 10 |
| 2012 | 6 | 12 |
| 2013 | 1 | 17 |
| 2014 | 8 | 18 |
| 2015 | 13 | 15 |
| 2016 | 11 | 18 |
| 2017 | 12 | 7 |
| 2018 | 14 | 7 |
| 2019 | 11 | 13 |
| 2020 | 9 | 3 |
| 2021 | 6 | 4 |
| 2022 | 9 | 17 |
| 2023 | 14 | 18 |
| 2024 | 23 | 16 |
| 2025 | 13 | 17 |
| 2026 | 15 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F22B 29/061Construction of tube walls70
- F22B 29/12Operating with superimposed recirculation during starting and low-load periods17
- F22B 29/067Operating at critical or supercritical pressure14
- F22B 29/08Operating with fixed point of final state of complete evaporation4
- F22B 29/068Operating with superimposed recirculation during normal operation3
- F22B 29/10Operating with sliding point of final state of complete evaporation1
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