F28D 7/103
Consisting of more than two coaxial conduits or modules of more than
Official title: {consisting of more than two coaxial conduits or modules of more than two coaxial conduits}
F28D7/103 (Consisting of more than two coaxial conduits or modules of more than) appears on 227 US grants and 240 published applications in this corpus.
Search patents in F28D- Granted patents
- 227
- Published applications
- 240
- Assignees
- 201
- Inventors
- 599
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 9 | 0 |
| 2002 | 4 | 1 |
| 2003 | 0 | 3 |
| 2004 | 2 | 2 |
| 2005 | 1 | 5 |
| 2006 | 1 | 5 |
| 2007 | 2 | 6 |
| 2008 | 1 | 3 |
| 2009 | 1 | 6 |
| 2010 | 5 | 9 |
| 2011 | 2 | 15 |
| 2012 | 5 | 11 |
| 2013 | 7 | 17 |
| 2014 | 11 | 14 |
| 2015 | 5 | 11 |
| 2016 | 7 | 20 |
| 2017 | 9 | 17 |
| 2018 | 19 | 12 |
| 2019 | 19 | 13 |
| 2020 | 7 | 6 |
| 2021 | 10 | 11 |
| 2022 | 8 | 11 |
| 2023 | 9 | 10 |
| 2024 | 10 | 12 |
| 2025 | 7 | 14 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Turbomachine comprising a heat exchanger between a fuel circuit and two lubricant circuits28 Apr 2026US 12,612,866 B2Safran Aircraft Engines
- Grey water heat recovery apparatus24 Feb 2026US 12,560,390 B2Consat AB
- Groundwater heat exchanger23 Sep 2025US 12,422,169 B2Darcy Solutions, Inc.
- Thermal oscillation systems19 Aug 2025US 12,392,302 B2Exency Ltd.
- Device for transferring heat from a gaseous working medium29 Jul 2025US 12,372,307 B2RIMACOMP—GmbH
- Cleaning appliance27 Aug 2026US 2026/0249328 A1Alfred Kärcher GmbH & Co. KG
- Apparatus, System and Method for Heat Exchanger End Plate Erosion Resistance13 Aug 2026US 2026/0235371 A1Westermeyer Industries Inc.
- Thermal energy recovery devices for electrically heated cracking processes6 Aug 2026US 2026/0226353 A1Sabic Global Technologies B.V.
- Heat exchanger and burner4 Jun 2026US 2026/0153292 A1NGK Insulators, Ltd.
- Heat exchanger with waveform channel profile7 May 2026US 2026/0126252 A1Aerojet Rocketdyne, Inc.
Most cited
By later US patents
- Thermally integrated heat exchange system for solid oxide electrolyte systems76US 5,340,664 ACeramatec, Inc. · 1994
- Method of manufacturing a concentric tube heat exchanger50US 4,096,616 AGeneral Electric Company · 1978
- Quartz glass tube liquid heating apparatus with concentric flow paths45US 5,271,086 AAsahi Glass Company, Limited · 1993
- Heat exchanger in the burner cup of a heat engine42US 6,293,101 B1Fantom Technologies Inc. · 2001
- Annular flow concentric tube recuperator42US 6,390,185 B12002