F22B 29/12
Operating with superimposed recirculation during starting and low-load periods
Official title: operating with superimposed recirculation during starting and low-load periods, e.g. composite boilers
F22B29/12 (Operating with superimposed recirculation during starting and low-load periods) appears on 17 US grants and 6 published applications in this corpus.
Search patents in F22B- Granted patents
- 17
- Published applications
- 6
- Assignees
- 15
- Inventors
- 30
- Latest grant
- 4 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Water feedback in vertical forced-flow steam generators4 Jul 2023US 11,692,703 B2Siemens Energy Global GmbH & Co. KG
- Subcritical pressure high-temperature steam power plant and subcritical pressure high-temperature variable pressure operation once-through boiler10 Oct 2017US 9,784,137 B2Mitsubishi Hitachi Power Systems, Ltd.
- Method for operating a once-through steam generator and steam generator designed for carrying out the method24 Nov 2015US 9,194,577 B2Siemens Aktiengesellschaft
- Start-up system mixing sphere31 Jul 2012US 8,230,686 B2
- Circulation system for sliding pressure steam generator15 Sep 2009US 7,587,996 B2Babcock & Wilcox Power Generation Group, Inc.
- Water feedback in vertical forced-flow steam generators6 May 2021US 2021/0131312 A1Siemens Aktiengesellschaft
- Subcritical pressure high-temperature steam power plant and subcritical pressure high-temperature variable pressure operation once-through boiler1 May 2014US 2014/0116052 A1Babcock-Hitachi Kabushiki Kaisha
- Method for operating a once-through steam generator and steam generator designed for carrying out the method16 Jan 2014US 2014/0014189 A1Siemens Aktiengesellschaft
- Ejector driven steam generator start up system7 Oct 2010US 2010/0251976 A1ALSTOM Technology Ltd
- Start-up system mixing sphere15 Apr 2010US 2010/0089061 A1ALSTOM Technology Ltd
Most cited
By later US patents
- Method of starting a forced-flow steam generator23US 4,262,636 ASulzer Brothers Limited · 1981
- Forced flow vapor generator plant20US 4,430,962 ASulzer Brothers Limited · 1984
- Integral separator start-up system for a vapor generator with constant pressure furnace circuitry17US 4,099,384 AFoster Wheeler Energy Corporation · 1978
- Integral separation start-up system for a vapor generator with variable pressure furnace circuitry15US 3,954,087 AFoster Wheeler Energy Corporation · 1976
- Method of operating a once-through steam generator15US 4,869,210 ASiemens Aktiengesellschaft · 1989