F01K 25/065
With an absorption fluid remaining at least partly in the liquid state
Official title: {with an absorption fluid remaining at least partly in the liquid state, e.g. water for ammonia (F01K5/00 takes precedence)}
F01K25/065 (With an absorption fluid remaining at least partly in the liquid state) appears on 169 US grants and 108 published applications in this corpus.
Search patents in F01K- Granted patents
- 169
- Published applications
- 108
- Assignees
- 81
- Inventors
- 216
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 6 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 11 | 0 |
| 2001 | 9 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 3 |
| 2004 | 5 | 4 |
| 2005 | 4 | 4 |
| 2006 | 4 | 8 |
| 2007 | 2 | 5 |
| 2008 | 6 | 4 |
| 2009 | 3 | 4 |
| 2010 | 3 | 6 |
| 2011 | 2 | 4 |
| 2012 | 4 | 5 |
| 2013 | 3 | 4 |
| 2014 | 3 | 6 |
| 2015 | 3 | 3 |
| 2016 | 3 | 3 |
| 2017 | 6 | 10 |
| 2018 | 8 | 7 |
| 2019 | 5 | 5 |
| 2020 | 4 | 1 |
| 2021 | 5 | 3 |
| 2022 | 1 | 8 |
| 2023 | 8 | 2 |
| 2024 | 2 | 2 |
| 2025 | 3 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Heat engines, systems for providing pressurized refrigerant, and related methods26 Aug 2025US RE50,556 E1Heat Source Energy Corp.
- Modified kalina system for efficient power and water production12 Aug 2025US 12,383,865 B2Hamad Bin Khalifa University
- Method for increasing an entropy flow in a turbomachine12 Nov 2024US 12,140,051 B2
- Two-phase heat engine9 Jul 2026US 2026/0193995 A1Technion Research & Development Foundation Limited
- Thermal energy storage system11 Jun 2026US 2026/0160188 A1Technion Research & Development Foundation Limited
- Heat engine using a liquid-vapor-phase-changing material12 Feb 2026US 2026/0043340 A1Lava Energy Ltd
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Most cited
By later US patents
- High efficiency absorption heat pump and methods of use143US 7,313,926 B2Rexorce Thermionics, Inc. · 2008
- System and method for heat recovery from geothermal source of heat102US 7,124,584 B1General Electric Company · 2006
- Generation of energy99US 4,489,563 A1984
- Gas powered motors72US 4,449,372 A1984
- Multi-use absorption/regeneration power cycle71US 4,009,575 A1977