F22B 37/46
Responsive to low or high water level
Official title: responsive to low or high water level, e.g. for checking, suppressing or extinguishing combustion in boilers
F22B37/46 (Responsive to low or high water level) appears on 16 US grants and 19 published applications in this corpus.
Search patents in F22B- Granted patents
- 16
- Published applications
- 19
- Assignees
- 16
- Inventors
- 54
- Latest grant
- 17 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 3 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 3 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 2 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 3 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Feedforward structure for controlling steam drum water level in steam turbine FCB test and control method for the same17 Jan 2023US 11,555,611 B2China Energy Engineering Eastern Electric Power Testing Research Institute Co., Ltd.
- Steam generator level control system and method of preventing oscillation of steam generator level9 Apr 2019US 10,256,000 B2Kepco Engineering & Construction Company, Inc.
- System and method for drum level control in a drum of a heat recovery steam generator20 Nov 2018US 10,132,492 B2General Electric Company
- Aqueous working fluid steam generation system17 Apr 2018US 9,945,553 B2
- Low water sensor testing device19 Sep 2017US 9,765,978 B2
- Foam detection technique-algorithm for steam boilers using lwco device6 Mar 2025US 2025/0075900 A1Fluid Handling LLC
- Liquid level estimation in a steam generation system4 Apr 2024US 2024/0110697 A1Whirlpool Corporation
- Apparatus for cooking food3 Nov 2022US 2022/0349588 A1Atihc S.R.L.
- Apparatus for cooking food21 Jul 2022US 2022/0228739 A1Atihc S.R.L.
- Feedforward structure for controlling steam drum water level in steam turbine fcb test and control method for the same24 Feb 2022US 2022/0057082 A1China Energy Engineering Eastern Electric Power Testing Research Institute Co., Ltd.
Most cited
By later US patents
- Boiler water level monitoring and control system17US 7,409,301 B2Cleaver-Brooks, Inc. · 2008
- Temperature and low water monitoring for boiler systems10US 7,891,572 B1C. Cowles & Company · 2011
- Water feed controller for a boiler8US 7,992,527 B2Potter Electric Signal Company, LLC · 2011
- Control of nuclear reactor power plant on occurrence of rupture in coolant tubes6US 4,692,297 AWestinghouse Electric Corp. · 1987
- Boiler protection apparatus and method6US 8,008,603 B22011