F22B 33/14
Combinations of low- and high-pressure boilers
Official title: Combinations of low- and high-pressure boilers {(combination of low- and high-pressure locomotive boilers of fire-box type F22B13/065)}
F22B33/14 (Combinations of low- and high-pressure boilers) appears on 18 US grants and 19 published applications in this corpus.
Search patents in F22B- Granted patents
- 18
- Published applications
- 19
- Assignees
- 19
- Inventors
- 55
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 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 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 3 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 0 | 2 |
| 2016 | 3 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Steam utilization system of factory producing concrete pipe pile2 Dec 2025US 12,485,577 B2Guangdong University of Technology
- System and method for top platform assembly of heat recovery steam generator (HRSG)27 May 2025US 12,313,255 B2GE Infrastructure Technology LLC
- System and method for top platform assembly of heat recovery steam generator (HRSG)31 May 2022US 11,346,544 B2General Electric Company
- Energy saving boiler system of steam supply5 Jan 2021US 10,883,713 B2Guangdong University of Technology
- Transition casting for boiler with steam cooled upper furnace9 Apr 2019US 10,253,972 B2The Babcock & Wilcox Company
- Process and Steam Generating Device for Generating Process Steam19 Sep 2024US 2024/0310035 A1Fraunhofer-Gesellschaft zur Forderung der Angwandten Forschung e.V.
- Steam utilization system of factory producting concrete pipe pile24 Aug 2023US 2023/0264387 A1Guangdong University of Technology
- System and method for top platform assembly of heat recovery steam generator (hrsg)21 Apr 2022US 2022/0120434 A1General Electric Company
- System and method for top platform assembly of heat recovery steam generator (hrsg)4 Mar 2021US 2021/0063012 A1General Electric Company
- Energy saving boiler system of steam supply26 Jul 2018US 2018/0209638 A1Guangdong University of Technology
Most cited
By later US patents
- Heat recovery steam generator23US 4,501,233 ABabcock-Hitachi Kabushiki Kaisha · 1985
- Pressure staged heat exchanger16US 4,072,182 AInternational Power Technology, Inc. · 1978
- Steam generators and combined cycle power plants employing the same16US 4,627,386 ASolar Turbines Incorporated · 1986
- Combined cycle power plant14US 4,989,405 ASolar Turbines Incorporated · 1991
- Ethylene oxide process improvement9US 4,759,313 AShell Oil Company · 1988