F01P 3/22
Liquid cooling: characterised by evaporation and condensation of coolant in closed cycles
Official title: characterised by evaporation and condensation of coolant in closed cycles (other cooling by evaporation F01P9/02); characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
F01P3/22 (Liquid cooling: characterised by evaporation and condensation of coolant in closed cycles) appears on 218 US grants and 124 published applications in this corpus.
Search patents in F01P- Granted patents
- 218
- Published applications
- 124
- Assignees
- 105
- Inventors
- 366
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 12 | 0 |
| 1986 | 27 | 0 |
| 1987 | 23 | 0 |
| 1988 | 7 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 3 |
| 2003 | 3 | 3 |
| 2004 | 2 | 3 |
| 2005 | 4 | 8 |
| 2006 | 6 | 5 |
| 2007 | 3 | 3 |
| 2008 | 3 | 5 |
| 2009 | 2 | 5 |
| 2010 | 5 | 2 |
| 2011 | 2 | 5 |
| 2012 | 0 | 3 |
| 2013 | 2 | 1 |
| 2014 | 4 | 5 |
| 2015 | 3 | 9 |
| 2016 | 4 | 9 |
| 2017 | 8 | 10 |
| 2018 | 8 | 9 |
| 2019 | 12 | 12 |
| 2020 | 5 | 5 |
| 2021 | 6 | 4 |
| 2022 | 4 | 3 |
| 2023 | 6 | 2 |
| 2024 | 1 | 5 |
| 2025 | 2 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01P 3/2285Closed cycles with condenser and feed pump71
- F01P 2003/2278Heat pipesIndexing code28
- F01P 2003/2214CondensersIndexing code25
- F01P 3/2271Closed cycles with separator and liquid return24
- F01P 3/2207Characterised by the coolant reaching temperatures higher than the normal atmospheric boiling23
- F01P 2003/2292With thermostatically controlled by-passIndexing code5
Recent patents
- Coolant circuit for a self-propelled working machine comprising multiple electric drive components1 Sep 2026US 12,722,474 B2Manitowoc Crane Group France SAS
- Cooling system for cooling an exhaust-gas turbocharger2 Jun 2026US 12,644,397 B2BorgWarner Inc.
- Absorption chiller system with a transport membrane heat exchanger30 Sep 2025US 12,429,254 B2Scuderi Group, LLC
- Fluid phase change thermal management arrangement and method22 Apr 2025US 12,284,786 B2
- Efficiency and comfort system for motorized vehicles3 Sep 2024US 12,078,087 B2Repg Enerji Sistemleri Sanayi Ve Ticaret Anonim Sirketi
- Cooling system21 May 2026US 2026/0143654 A1Aisin Corporation
- Absorption chiller system with a transport membrane heat exchanger23 Apr 2026US 2026/0110462 A1Scuderi Group, LLC
- Cooling system for cooling an exhaust-gas turbocharger8 Jan 2026US 2026/0009349 A1BorgWarner Inc.
- Integrated module, thermal management system, and vehicle10 Jul 2025US 2025/0223916 A1BYD Company Limited
- Absorption chiller system with a transport membrane heat exchanger30 Jan 2025US 2025/0035345 A1Scuderi Group, LLC
Most cited
By later US patents
- Boiling liquid cooling system for internal combustion engines86US 4,630,572 AEvans Cooling Associates · 1986
- Two-phase heat-transfer systems82US 6,866,092 B12005
- Boiling liquid engine cooling system58US 4,367,699 AEVC Associates Limited Partnership · 1983
- Exhaust gas recirculation cooler56US 6,612,293 B2AVL List GmbH · 2003
- Phase change assisted heat sink55US 6,239,502 B1BAE Systems Controls Inc. · 2001