F28D 7/024
The conduits of only one medium being helically coiled tubes, the coils
Official title: {the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration}
F28D7/024 (The conduits of only one medium being helically coiled tubes, the coils) appears on 548 US grants and 535 published applications in this corpus.
Search patents in F28D- Granted patents
- 548
- Published applications
- 535
- Assignees
- 391
- Inventors
- 1,266
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 12 | 0 |
| 1982 | 14 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 4 |
| 2002 | 6 | 14 |
| 2003 | 8 | 9 |
| 2004 | 10 | 13 |
| 2005 | 8 | 17 |
| 2006 | 5 | 16 |
| 2007 | 4 | 22 |
| 2008 | 7 | 32 |
| 2009 | 16 | 20 |
| 2010 | 10 | 25 |
| 2011 | 18 | 21 |
| 2012 | 13 | 34 |
| 2013 | 12 | 23 |
| 2014 | 12 | 34 |
| 2015 | 15 | 29 |
| 2016 | 20 | 28 |
| 2017 | 37 | 28 |
| 2018 | 25 | 31 |
| 2019 | 26 | 27 |
| 2020 | 23 | 20 |
| 2021 | 16 | 18 |
| 2022 | 15 | 20 |
| 2023 | 13 | 18 |
| 2024 | 16 | 17 |
| 2025 | 12 | 11 |
| 2026 | 9 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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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
- Microwave purification process91US 7,905,942 B1SDCmaterials, Inc. · 2011
- Method of servicing a helical coil heat exchanger with removable end plates86US 6,102,106 AFlowserve Management Company · 2000