F28F 21/02
Constructions of heat-exchange apparatus characterised by the selection of particular materials: of
Official title: of carbon, e.g. graphite
F28F21/02 (Constructions of heat-exchange apparatus characterised by the selection of particular materials: of) appears on 415 US grants and 576 published applications in this corpus.
Search patents in F28F- Granted patents
- 415
- Published applications
- 576
- Assignees
- 345
- Inventors
- 1,255
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 9 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 12 |
| 2003 | 3 | 15 |
| 2004 | 13 | 8 |
| 2005 | 4 | 14 |
| 2006 | 6 | 13 |
| 2007 | 9 | 19 |
| 2008 | 7 | 10 |
| 2009 | 6 | 15 |
| 2010 | 4 | 26 |
| 2011 | 5 | 19 |
| 2012 | 3 | 19 |
| 2013 | 9 | 25 |
| 2014 | 8 | 24 |
| 2015 | 17 | 36 |
| 2016 | 22 | 29 |
| 2017 | 27 | 40 |
| 2018 | 25 | 44 |
| 2019 | 30 | 54 |
| 2020 | 34 | 36 |
| 2021 | 26 | 23 |
| 2022 | 26 | 30 |
| 2023 | 17 | 18 |
| 2024 | 23 | 23 |
| 2025 | 16 | 13 |
| 2026 | 5 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- A thermal strap and a method for manufacturing a thermal strap27 Aug 2026US 2026/0251409 A1
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Most cited
By later US patents
- Microscopic tube material and its method of manufacture118US 5,352,512 AThe United States of America as represented by the Secretary of the Air Force · 1994
- Heat exchanger115US 4,244,423 A1981
- Heat exchanger113US 4,119,141 A1978
- Method of manufacturing microscopic tube material113US 5,011,566 AThe United States of America as represented by the Secretary of the Air Force · 1991
- Immersion heat exchangers108US 6,113,154 A2000