F22D 11/02
Arrangements of feed-water pumps
F22D11/02 (Arrangements of feed-water pumps) appears on 73 US grants and 40 published applications in this corpus.
Search patents in F22D- Granted patents
- 73
- Published applications
- 40
- Assignees
- 42
- Inventors
- 137
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 4 |
| 2015 | 0 | 2 |
| 2016 | 3 | 3 |
| 2017 | 3 | 3 |
| 2018 | 4 | 3 |
| 2019 | 3 | 3 |
| 2020 | 3 | 6 |
| 2021 | 2 | 5 |
| 2022 | 5 | 1 |
| 2023 | 3 | 4 |
| 2024 | 0 | 0 |
| 2025 | 2 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Steam utilization system of factory producing concrete pipe pile2 Dec 2025US 12,485,577 B2Guangdong University of Technology
- Chemical dispensing system for treating fluid in boiler/cooling systems8 Jul 2025US 12,352,431 B2Condor Technologies, Inc.
- Energy-saving system using electric heat pump to deeply recover flue gas waste heat from heat power plant for district heating21 Nov 2023US 11,821,637 B2Dalian University of Technology
- Chemical dispensing system for treating fluid in boiler/cooling systems19 Sep 2023US 11,761,624 B2CONDOR TECHNOLOGIES, a division of AZURE WATER SER
- Water vapor insulation system28 Mar 2023US 11,614,229 B2
- Method for Generating Steam and Steam Generation Device20 Aug 2026US 2026/0243418 A1Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Chemical dispensing system for treating fluid in boiler/cooling systems8 Jan 2026US 2026/0009531 A1Condor Technologies, Inc.
- Chemical dispensing system for treating fluid in boiler/cooling systems28 Dec 2023US 2023/0417408 A1Condor Technologies, Inc.
- Steam utilization system of factory producting concrete pipe pile24 Aug 2023US 2023/0264387 A1Guangdong University of Technology
- Water vapor insulation system10 Aug 2023US 2023/0250953 A1
Most cited
By later US patents
- Combined boiler feed and condensate pump124US 5,215,448 AIngersoll-Dresser Pump Company · 1993
- Leak proof, preloaded, high-biasing force float-operated over-center valve actuating mechanism26US 5,141,405 A1992
- Multi-compression coil springs for a liquid pump21US 5,865,603 A1999
- Pump and combination pump and trap with snap-over mechanism and double-seal outlet valve19US 5,655,888 ATLV Co., Ltd. · 1997
- Method and apparatus for supplying feedwater to a forced flow boiler17US 4,541,365 AClayton Manufacturing Company · 1985