F01K 25/04
The fluid being in different phases
Official title: the fluid being in different phases, e.g. foamed
F01K25/04 (The fluid being in different phases) appears on 63 US grants and 77 published applications in this corpus.
Search patents in F01K- Granted patents
- 63
- Published applications
- 77
- Assignees
- 43
- Inventors
- 128
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 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 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 4 |
| 2010 | 0 | 3 |
| 2011 | 1 | 2 |
| 2012 | 2 | 6 |
| 2013 | 4 | 13 |
| 2014 | 4 | 3 |
| 2015 | 0 | 3 |
| 2016 | 3 | 10 |
| 2017 | 6 | 4 |
| 2018 | 3 | 5 |
| 2019 | 4 | 2 |
| 2020 | 7 | 3 |
| 2021 | 2 | 2 |
| 2022 | 1 | 4 |
| 2023 | 5 | 3 |
| 2024 | 5 | 3 |
| 2025 | 3 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for increasing an entropy flow in a turbomachine20 Jan 2026US 12,529,328 B2
- Organic Rankine cycle decompression heat engine6 Jan 2026US RE50,731 E1Heat Source Energy Corp.
- Heat engines, systems for providing pressurized refrigerant, and related methods26 Aug 2025US RE50,556 E1Heat Source Energy Corp.
- Thermal oscillation systems19 Aug 2025US 12,392,302 B2Exency Ltd.
- Trilateral cycle system18 Mar 2025US 12,255,521 B2Isuzu Motors Limited
- Thermal energy storage system11 Jun 2026US 2026/0160188 A1Technion Research & Development Foundation Limited
- Electric energy generation from waste heat with heat transfer fluid pipes16 Apr 2026US 2026/0103631 A1Enover Isi Sistemleri Anonim Sirketi
- Thermal oscillation systems13 Nov 2025US 2025/0347257 A1Exency Ltd.
- Method for increasing an entropy flow in a turbomachine30 Jan 2025US 2025/0035014 A1
- Thermal oscillation systems26 Dec 2024US 2024/0426259 A1Exency Ltd.
Most cited
By later US patents
- Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange119US 8,436,489 B2LightSail Energy, Inc. · 2013
- Method and apparatus for compressing vaporous or gaseous fluids isothermally110US 4,027,993 APolaroid Corporation · 1977
- Heat engine system including an integrated cooling circuit75US 10,024,198 B2Echogen Power Systems, LLC · 2018
- Method and apparatus for processing vaporous or gaseous fluids69US 4,041,708 APolaroid Corporation · 1977
- Combined heat power system62US 8,674,525 B2Universiteit Gent · 2014