F28C 3/00
Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange
Official title: Other direct-contact heat-exchange apparatus
F28C3/00 (Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange) appears on 711 US grants and 587 published applications in this corpus.
Search patents in F28C- Granted patents
- 711
- Published applications
- 587
- Assignees
- 506
- Inventors
- 1,490
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 11 | 0 |
| 1978 | 18 | 0 |
| 1979 | 7 | 0 |
| 1980 | 12 | 0 |
| 1981 | 17 | 0 |
| 1982 | 15 | 0 |
| 1983 | 10 | 0 |
| 1984 | 18 | 0 |
| 1985 | 8 | 0 |
| 1986 | 11 | 0 |
| 1987 | 8 | 0 |
| 1988 | 11 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 10 | 0 |
| 1998 | 20 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 8 |
| 2002 | 9 | 7 |
| 2003 | 11 | 13 |
| 2004 | 7 | 13 |
| 2005 | 9 | 13 |
| 2006 | 15 | 17 |
| 2007 | 8 | 6 |
| 2008 | 4 | 24 |
| 2009 | 7 | 20 |
| 2010 | 5 | 22 |
| 2011 | 16 | 28 |
| 2012 | 18 | 33 |
| 2013 | 22 | 37 |
| 2014 | 18 | 48 |
| 2015 | 32 | 43 |
| 2016 | 30 | 24 |
| 2017 | 41 | 31 |
| 2018 | 22 | 32 |
| 2019 | 30 | 27 |
| 2020 | 33 | 30 |
| 2021 | 24 | 26 |
| 2022 | 21 | 16 |
| 2023 | 10 | 17 |
| 2024 | 18 | 24 |
| 2025 | 14 | 17 |
| 2026 | 7 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28C 3/06The heat-exchange media being a liquid and a gas or vapour413
- F28C 3/10One heat-exchange medium at least being a fluent solid182
- F28C 3/005One heat-exchange medium being a solid48
- F28C 3/04The heat-exchange media both being liquids32
- F28C 3/02The heat-exchange media both being gases or vapours23
Recent patents
- Fresh water evaporative cooling system29 Sep 2026US 12,747,874 B2Bessamaire Sales LLC
- Drying apparatus and system for preparing batteries29 Sep 2026US 12,747,915 B2Contemporary Amperex Technology (Hong Kong) Limited
- Power generation system16 Jun 2026US 12,656,064 B2Samsung Electronics Co., Ltd.
- Tunnel type hybrid cooling steam recycling apparatus21 Apr 2026US 12,607,410 B2Big Sun Energy Technology Inc.
- Extendable conductor for thermal management10 Mar 2026US 12,571,594 B2Lunar Outpost Inc.
- Power generation system8 Oct 2026US 2026/0309424 A1Samsung Electronics Co., Ltd.
- Microstructure for a fill sheet13 Aug 2026US 2026/0233191 A1Brentwood Industries, Inc.
- Rapid Thermal Conversion of Biomass13 Aug 2026US 2026/0234476 A1Ensyn Renewables, Inc.
- Cooling arrangement and method for cooling at least one oil-to-air external heat exchanger6 Aug 2026US 2026/0227131 A1Hitachi Energy Ltd
- Dry-wet combined heat exchange device9 Jul 2026US 2026/0194299 A1Shenzhen Envicool Technology Co., Ltd.
Most cited
By later US patents
- Rapid thermal conversion of biomass165US 7,905,990 B2Ensyn Renewables, Inc. · 2011
- Direct quench apparatus147US 3,959,420 AStone & Webster Engineering Corp. · 1976
- Heat transfer and storage system124US 4,727,930 AThe Board of Regents of the University of Washington · 1988
- Microwave purification process91US 7,905,942 B1SDCmaterials, Inc. · 2011
- Thermal gradient humidification-dehumidification desalination system87US 4,363,703 AInstitute of Gas Technology · 1982