F22D 1/16
Feed-water heaters, i.e. economisers or like preheaters: with water tubes arranged otherwise
Official title: with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
F22D1/16 (Feed-water heaters, i.e. economisers or like preheaters: with water tubes arranged otherwise) appears on 23 US grants and 29 published applications in this corpus.
Search patents in F22D- Granted patents
- 23
- Published applications
- 29
- Assignees
- 20
- Inventors
- 52
- Latest grant
- 18 Aug 2026
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 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 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 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 3 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 3 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 3 |
| 2022 | 1 | 1 |
| 2023 | 2 | 3 |
| 2024 | 1 | 2 |
| 2025 | 2 | 3 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Comprehensive energy utilization system for coupling carbon capture, energy storage, and thermal power generation18 Aug 2026US 12,710,000 B2Exax Energy Technology (Shenzhen) Co., Ltd
- Power generation system employing power amplifying thermo-mechanical inverter technology24 Feb 2026US 12,562,579 B2Kalindha Rashmi LLC
- Building emission processing and/or sequestration systems and methods17 Feb 2026US 12,553,603 B2Carbonquest, Inc.
- Building emission processing and/or sequestration systems and methods2 Sep 2025US 12,405,000 B2Carbonquest, Inc.
- Systems and methods for isolating substantially pure carbon dioxide from flue gas26 Aug 2025US 12,398,880 B2Carbonquest, Inc.
- Building Emission Processing and/or Sequestration Systems and Methods10 Sep 2026US 2026/0266457 A1Carbonquest, Inc.
- Building Emission Processing and/or Sequestration Systems and Methods27 Aug 2026US 2026/0251297 A1Carbonquest, Inc.
- Power Generation System Employing Power Amplifying Thermo-Mechanical Inverter Technology16 Jul 2026US 2026/0204916 A1Kalindha Rashmi LLC
- Comprehensive energy utilization system for coupling carbon capture, energy storage, and thermal power generation9 Jul 2026US 2026/0193993 A1Exax Energy Technology (Shenzhen) Co., Ltd
- Exhaust Heat Recovery System4 Dec 2025US 2025/0369609 A1Hitachi Industrial Equipment Systems Co., Ltd.
Most cited
By later US patents
- Combination heat exchanger and blower9US 4,011,904 A1977
- Heat exchanger array for a step down return of condensate6US 4,648,355 A1987
- Flash economizer4US 4,732,590 A1988
- Boiler system comprising an integrated economizer2US 10,197,266 B2Thermodesign, Inc. · 2019
- Steam turbine power plant utilizing industrial heat pumps to preheat boiler feed-water2US 11,022,005 B22021