F01K 27/00
Plants for converting heat or fluid energy into mechanical energy, not otherwise
Official title: Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
F01K27/00 (Plants for converting heat or fluid energy into mechanical energy, not otherwise) appears on 422 US grants and 523 published applications in this corpus.
Search patents in F01K- Granted patents
- 422
- Published applications
- 523
- Assignees
- 248
- Inventors
- 830
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 3 |
| 2003 | 3 | 1 |
| 2004 | 1 | 6 |
| 2005 | 3 | 9 |
| 2006 | 4 | 4 |
| 2007 | 2 | 7 |
| 2008 | 4 | 9 |
| 2009 | 4 | 13 |
| 2010 | 5 | 24 |
| 2011 | 10 | 35 |
| 2012 | 14 | 30 |
| 2013 | 23 | 31 |
| 2014 | 27 | 31 |
| 2015 | 7 | 33 |
| 2016 | 20 | 26 |
| 2017 | 41 | 44 |
| 2018 | 28 | 30 |
| 2019 | 32 | 32 |
| 2020 | 40 | 30 |
| 2021 | 26 | 30 |
| 2022 | 17 | 24 |
| 2023 | 18 | 13 |
| 2024 | 15 | 21 |
| 2025 | 12 | 21 |
| 2026 | 12 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat engine using a liquid-vapor-phase-changing material22 Sep 2026US 12,742,402 B2Lava Energy Ltd
- Two-phase thermal pump15 Sep 2026US 12,735,999 B2Rolls-Royce North American Technologies Inc.
- Thermoutilizer4 Aug 2026US 12,698,729 B2
- Processor-based organic Rankine cycle system for predictively-modeled recovery and conversion of thermal energy7 Jul 2026US 12,674,402 B2
- Ship waste heat power generation system utilizing waste heat from ships16 Jun 2026US 12,655,777 B2Korea Institute of Ocean Science & Technology
- High temperature geothermal well tractor20 Aug 2026US 2026/0243139 A1Halliburton Energy Services.Inc.
- Loopback Heat Harvesting System20 Aug 2026US 2026/0243178 A1Jemm's Labs
- Recursive and Encapsulated Heat Harvesting System20 Aug 2026US 2026/0243179 A1Jemm's Labs
- Recursive and Encapsulated Heat Harvesting System20 Aug 2026US 2026/0243180 A1Jemm's Labs
- Air Cooling System20 Aug 2026US 2026/0243458 A1Jemm's Labs
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
- Fluid pressure power plant with double-acting piston105US 3,991,574 A1976
- Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange97US 8,065,874 B2Lightsale Energy, Inc. · 2011
- Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange90US 8,240,142 B2LightSail Energy, Inc. · 2012
- System and method for rapid isothermal gas expansion and compression for energy storage86US 7,802,426 B2SustainX, Inc. · 2010