F01P 3/00
Liquid cooling
F01P3/00 (Liquid cooling) appears on 3,600 US grants and 3,165 published applications in this corpus.
Search patents in F01P- Granted patents
- 3,600
- Published applications
- 3,165
- Assignees
- 891
- Inventors
- 6,821
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 17 | 0 |
| 1978 | 15 | 0 |
| 1979 | 13 | 0 |
| 1980 | 12 | 0 |
| 1981 | 12 | 0 |
| 1982 | 18 | 0 |
| 1983 | 25 | 0 |
| 1984 | 23 | 0 |
| 1985 | 47 | 0 |
| 1986 | 49 | 0 |
| 1987 | 50 | 0 |
| 1988 | 40 | 0 |
| 1989 | 35 | 0 |
| 1990 | 43 | 0 |
| 1991 | 49 | 0 |
| 1992 | 46 | 0 |
| 1993 | 36 | 0 |
| 1994 | 23 | 0 |
| 1995 | 30 | 0 |
| 1996 | 36 | 0 |
| 1997 | 34 | 0 |
| 1998 | 45 | 0 |
| 1999 | 50 | 0 |
| 2000 | 64 | 0 |
| 2001 | 53 | 29 |
| 2002 | 61 | 68 |
| 2003 | 72 | 64 |
| 2004 | 61 | 64 |
| 2005 | 56 | 87 |
| 2006 | 80 | 75 |
| 2007 | 55 | 62 |
| 2008 | 48 | 64 |
| 2009 | 40 | 74 |
| 2010 | 46 | 57 |
| 2011 | 41 | 87 |
| 2012 | 49 | 81 |
| 2013 | 63 | 116 |
| 2014 | 88 | 115 |
| 2015 | 108 | 179 |
| 2016 | 112 | 216 |
| 2017 | 165 | 256 |
| 2018 | 194 | 227 |
| 2019 | 251 | 292 |
| 2020 | 271 | 231 |
| 2021 | 259 | 187 |
| 2022 | 204 | 159 |
| 2023 | 135 | 135 |
| 2024 | 112 | 93 |
| 2025 | 101 | 72 |
| 2026 | 52 | 75 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01P 3/20Cooling circuits not specific to a single part of engine or machine1,539
- F01P 3/02Arrangements for cooling cylinders or cylinder heads923
- F01P 3/18Arrangements or mounting of liquid-to-air heat-exchangers628
- F01P 3/12Arrangements for cooling other engine or machine parts435
- F01P 3/06Arrangements for cooling pistons291
- F01P 3/22Liquid cooling: characterised by evaporation and condensation of coolant in closed cycles218
- F01P 2003/006The liquid being oilIndexing code147
- F01P 2003/001Cooling liquidIndexing code93
Recent patents
- Internal combustion engine with combustion pre-chamber6 Oct 2026US 12,753,717 B2Brp-Rotax GmbH & Co. KG
- Valve device29 Sep 2026US 12,747,797 B2Denso Corporation
- Coolant tank with outer component interfaces and outer channels for conducting coolant22 Sep 2026US 12,742,409 B2Hella GmbH & Co. KGaA
- Marine propulsion device22 Sep 2026US 12,742,410 B2Yamaha Hatsudoki Kabushiki Kaisha
- Coolant circuit for a self-propelled working machine comprising multiple electric drive components1 Sep 2026US 12,722,474 B2Manitowoc Crane Group France SAS
- Coolant module8 Oct 2026US 2026/0309068 A1Hanon Systems
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
- Containerized ultra-low nox diesel engine generator set with roof-mounted selective catalytic reduction system8 Oct 2026US 2026/0309075 A1Industrial Service Solutions WC, Inc.
- Fluid distributor valve with temperature sensor1 Oct 2026US 2026/0298127 A1Stoneridge Control Devices, Inc.
- A coolant system for a vehicle1 Oct 2026US 2026/0298128 A1Volvo Truck Corporation
Most cited
By later US patents
- Hybrid electric vehicle regenerative braking energy recovery system317US 5,291,960 AFord Motor Company · 1994
- Premixed charge compression ignition engine with optimal combustion control196US 6,276,334 B1Cummins Engine Company, Inc. · 2001
- Engine cooling system171US 8,770,329 B2Caterpillar Forest Products Inc. · 2014
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods133US 11,236,739 B2BJ Energy Solutions, LLC · 2022
- Hybird vehicle cooling system127US 5,255,733 AFord Motor Company · 1993