F22D 11/00
Feed-water supply not provided for in other main groups
F22D11/00 (Feed-water supply not provided for in other main groups) appears on 183 US grants and 93 published applications in this corpus.
Search patents in F22D- Granted patents
- 183
- Published applications
- 93
- Assignees
- 99
- Inventors
- 364
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 11 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 4 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 3 | 1 |
| 2010 | 2 | 1 |
| 2011 | 1 | 6 |
| 2012 | 2 | 3 |
| 2013 | 2 | 3 |
| 2014 | 2 | 7 |
| 2015 | 3 | 5 |
| 2016 | 4 | 4 |
| 2017 | 5 | 7 |
| 2018 | 8 | 4 |
| 2019 | 3 | 8 |
| 2020 | 5 | 9 |
| 2021 | 7 | 9 |
| 2022 | 5 | 4 |
| 2023 | 10 | 6 |
| 2024 | 1 | 2 |
| 2025 | 2 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for removing organic compounds from water used to generate steam10 Feb 2026US 12,545,602 B2Donaldson Company, Inc.
- 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.
- Solute concentration decision method and water quality management method for steam turbine plant2 Jul 2024US 12,025,305 B2Mitsubishi Heavy Industries, Ltd.
- Steam turbine plant and control device, and water quality management method for steam turbine plant5 Dec 2023US 11,834,969 B2Mitsubishi Power, Ltd.
- 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.
- Process and Steam Generating Device for Generating Process Steam19 Sep 2024US 2024/0310035 A1Fraunhofer-Gesellschaft zur Forderung der Angwandten Forschung e.V.
- Recovery and reuse of high-pressure boilers and heat recovery steam generators blowdown using microwave energy irradiation25 Jul 2024US 2024/0247799 A1Saudi Arabian Oil Company
- Chemical dispensing system for treating fluid in boiler/cooling systems28 Dec 2023US 2023/0417408 A1Condor Technologies, Inc.
Most cited
By later US patents
- Combined boiler feed and condensate pump124US 5,215,448 AIngersoll-Dresser Pump Company · 1993
- Inhibition of scale deposition from steam generation fluids76US 4,476,930 AUnion Oil Company of California · 1984
- Method for production of high pressure steam from produced water54US 7,591,309 B2Aquatech International Corporation · 2009
- Water treatment control system for a boiler40US 5,152,252 AAutotrol Corporation · 1992
- Concentration cycles, percent life holding time and continuous treatment concentration monitoring in boiler systems by inert tracers39US 5,041,386 ANalco Chemical Company · 1991