F22B 35/008
Control systems for two or more steam generators
Official title: {Control systems for two or more steam generators (automatic water-feed control for a number of steam boilers designed for different ranges of temperature and pressure F22D5/36)}
F22B35/008 (Control systems for two or more steam generators) appears on 43 US grants and 28 published applications in this corpus.
Search patents in F22B- Granted patents
- 43
- Published applications
- 28
- Assignees
- 26
- Inventors
- 87
- Latest grant
- 30 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 3 | 1 |
| 2014 | 2 | 1 |
| 2015 | 2 | 6 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 3 |
| 2023 | 4 | 2 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Microprocessor-based boiler controller39US 5,172,654 ACentury Controls, Inc. · 1992
- Boiler optimization for multiple boiler heating plants31US 4,864,972 A1989
- Multiple boiler control system and method of operation29US 5,042,431 AHeat-Timer Corporation · 1991
- Boiler control system28US 5,732,664 A1998
- System for economic unit load distribution during process load transition20US 4,745,758 AWestinghouse Electric Corp. · 1988