F28D 7/022
The conduits of two or more media in heat-exchange relationship being helically
Official title: {the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration}
F28D7/022 (The conduits of two or more media in heat-exchange relationship being helically) appears on 117 US grants and 124 published applications in this corpus.
Search patents in F28D- Granted patents
- 117
- Published applications
- 124
- Assignees
- 103
- Inventors
- 307
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 3 |
| 2005 | 0 | 5 |
| 2006 | 3 | 2 |
| 2007 | 3 | 1 |
| 2008 | 0 | 5 |
| 2009 | 2 | 5 |
| 2010 | 1 | 3 |
| 2011 | 1 | 8 |
| 2012 | 3 | 4 |
| 2013 | 0 | 0 |
| 2014 | 2 | 4 |
| 2015 | 1 | 7 |
| 2016 | 3 | 6 |
| 2017 | 4 | 9 |
| 2018 | 6 | 7 |
| 2019 | 4 | 6 |
| 2020 | 7 | 5 |
| 2021 | 7 | 12 |
| 2022 | 6 | 7 |
| 2023 | 8 | 11 |
| 2024 | 10 | 3 |
| 2025 | 5 | 6 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Apparatus and method for continuous depyrogenation and production of sterile water for injection95US 7,122,149 B2Applied Research Associates, Inc. · 2006
- Heat transfer system51US 5,802,864 APeregrine Industries, Inc. · 1998
- Fuel cooling system for use with a closed fuel injection circuit in a diesel engine45US 4,411,239 AKienzle Apparate GmbH · 1983
- Heat transfer system39US 6,253,564 B1Peregrine Industries, Inc. · 2001
- Method of producing multiple coil, multiple tube heat exchanger34US 4,451,960 AMolitor Industries, Inc. · 1984