F28D 7/0066
Multi-circuit heat-exchangers
Official title: {Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids (F28D7/103 takes precedence)}
F28D7/0066 (Multi-circuit heat-exchangers) appears on 541 US grants and 659 published applications in this corpus.
Search patents in F28D- Granted patents
- 541
- Published applications
- 659
- Assignees
- 394
- Inventors
- 1,536
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 7 |
| 2002 | 5 | 11 |
| 2003 | 10 | 14 |
| 2004 | 10 | 11 |
| 2005 | 7 | 14 |
| 2006 | 8 | 17 |
| 2007 | 9 | 18 |
| 2008 | 10 | 23 |
| 2009 | 8 | 20 |
| 2010 | 14 | 20 |
| 2011 | 15 | 20 |
| 2012 | 13 | 24 |
| 2013 | 11 | 24 |
| 2014 | 14 | 24 |
| 2015 | 16 | 27 |
| 2016 | 16 | 38 |
| 2017 | 29 | 55 |
| 2018 | 31 | 54 |
| 2019 | 46 | 56 |
| 2020 | 33 | 37 |
| 2021 | 31 | 29 |
| 2022 | 36 | 38 |
| 2023 | 29 | 28 |
| 2024 | 27 | 25 |
| 2025 | 26 | 13 |
| 2026 | 8 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat exchanger with tube bundle comprising at least two sections15 Sep 2026US 12,736,288 B2Valmex S.P.A.
- Tubular membrane heat exchanger12 May 2026US 12,624,897 B2Baltimore Aircoil Company, Inc.
- Turbomachine comprising a heat exchanger between a fuel circuit and two lubricant circuits28 Apr 2026US 12,612,866 B2Safran Aircraft Engines
- Heat exchanger, electric control box and air conditioning system28 Apr 2026US 12,613,039 B2Gd Midea Heating & Ventilating Equipment Co., Ltd.
- Heat exchanger with failure tolerance24 Mar 2026US 12,584,692 B2Rolls-Royce North American Technologies Inc.
- Equalizing flow manifold with bernoulli-derived hierarchical geometry, asymmetric inlet/outlet architectures, and modular polygonal flow units, and cooling apparatus including same24 Sep 2026US 2026/0287281 A1HRL Laboratories, LLC
- Condensing device and heat pump system comprising same20 Aug 2026US 2026/0243480 A1
- Cooking system and heat exchanger30 Jul 2026US 2026/0218986 A1
- Heat exchange apparatus14 May 2026US 2026/0132993 A1Rinnai Corporation
- Systems and methods for operating an aircraft engine using multiple fuel types30 Apr 2026US 2026/0117979 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Portable I.V. fluid warming system171US 6,142,974 AEstill Medical Technologies, Inc. · 2000
- Heat exchanger for fuel cell power plant reformer108US 4,781,241 AInternational Fuel Cells Corporation · 1988
- Oil-fired frac water heater92US 8,534,235 B22013
- Methods and apparatus for materials processing69US 6,752,529 B2Holl Technologies Company · 2004
- Indirect contact chiller air-precooler method and apparatus63US 5,390,505 ABaltimore Aircoil Company, Inc. · 1995