F28D 7/02
The conduits being helically coiled
Official title: the conduits being helically coiled (F28D7/10 takes precedence {F28D7/0016 and F28D7/0033 take precedence})
F28D7/02 (The conduits being helically coiled) appears on 808 US grants and 800 published applications in this corpus.
Search patents in F28D- Granted patents
- 808
- Published applications
- 800
- Assignees
- 550
- Inventors
- 1,754
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 10 | 0 |
| 1980 | 8 | 0 |
| 1981 | 15 | 0 |
| 1982 | 19 | 0 |
| 1983 | 13 | 0 |
| 1984 | 15 | 0 |
| 1985 | 14 | 0 |
| 1986 | 13 | 0 |
| 1987 | 9 | 0 |
| 1988 | 9 | 0 |
| 1989 | 13 | 0 |
| 1990 | 10 | 0 |
| 1991 | 8 | 0 |
| 1992 | 10 | 0 |
| 1993 | 7 | 0 |
| 1994 | 13 | 0 |
| 1995 | 4 | 0 |
| 1996 | 11 | 0 |
| 1997 | 5 | 0 |
| 1998 | 16 | 0 |
| 1999 | 9 | 0 |
| 2000 | 13 | 0 |
| 2001 | 16 | 4 |
| 2002 | 8 | 18 |
| 2003 | 9 | 12 |
| 2004 | 13 | 21 |
| 2005 | 12 | 26 |
| 2006 | 11 | 26 |
| 2007 | 10 | 29 |
| 2008 | 15 | 45 |
| 2009 | 21 | 23 |
| 2010 | 15 | 36 |
| 2011 | 21 | 38 |
| 2012 | 21 | 47 |
| 2013 | 21 | 35 |
| 2014 | 16 | 53 |
| 2015 | 22 | 46 |
| 2016 | 27 | 42 |
| 2017 | 48 | 44 |
| 2018 | 38 | 43 |
| 2019 | 36 | 38 |
| 2020 | 33 | 30 |
| 2021 | 30 | 32 |
| 2022 | 22 | 28 |
| 2023 | 24 | 34 |
| 2024 | 30 | 24 |
| 2025 | 22 | 18 |
| 2026 | 12 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28D 7/024The conduits of only one medium being helically coiled tubes, the coils548
- F28D 7/026The conduits of only one medium being helically coiled and formed by121
- F28D 7/022The conduits of two or more media in heat-exchange relationship being helically117
- F28D 7/028The conduits of at least one medium being helically coiled, the coils30
Recent patents
- Controllable injection for implementing different local refrigerant distribution6 Oct 2026US 12,753,975 B2Linde Aktiengesellschaft
- Heat exchanger with tube bundle comprising at least two sections15 Sep 2026US 12,736,288 B2Valmex S.P.A.
- Condensation heat exchanger7 Jul 2026US 12,674,602 B2Sermeta
- Double-tube heat exchanger and manufacturing method therefor26 May 2026US 12,638,241 B2Sumitomo Riko Company Limited
- Wound heat exchanger and method19 May 2026US 12,631,399 B2Linde Aktiengesellschaft
- Dishwasher27 Aug 2026US 2026/0248358 A1LG Electronics Inc.
- High-efficiency waste heat recovery sizing machine27 Aug 2026US 2026/0251393 A1Shaoxing Yongfeng Energy Saving Technology Co., Ltd.
- Heat exchanger for gas turbine engines13 Aug 2026US 2026/0235074 A1GE Avio S. r. l.
- Heat Exchange Assembly for Hydrogenation of Diesel and Wax Oil, and Hydrogenation System9 Jul 2026US 2026/0193549 A1Zhenhai Petrochemical Jianan Engineering Co., Ltd.
- Cooling device25 Jun 2026US 2026/0177312 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Blood oxygenator with integral heat exchanger for regulating the temperature of blood in an extracorporeal circuit119US 4,065,264 AShiley Laboratories, Inc. · 1977
- Extracorporeal circuit blood heat exchanger109US 4,231,425 A1980
- Method and apparatus for interacting a gas and liquid on a convoluted array of tubes96US 5,472,044 AE. I. Du Pont de Nemours and Company · 1995
- Apparatus and method for continuous depyrogenation and production of sterile water for injection95US 7,122,149 B2Applied Research Associates, Inc. · 2006
- Oil-fired frac water heater92US 8,534,235 B22013