F28D 15/02
In which the medium condenses and evaporates
Official title: in which the medium condenses and evaporates, e.g. heat pipes {(heat pipes used in solar heat collectors F24S10/95; in radiators F28D1/0226; in nuclear reactors G21C15/257)}
F28D15/02 (In which the medium condenses and evaporates) appears on 4,769 US grants and 6,241 published applications in this corpus.
Search patents in F28D- Granted patents
- 4,769
- Published applications
- 6,241
- Assignees
- 1,842
- Inventors
- 9,207
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 42 | 0 |
| 1977 | 49 | 0 |
| 1978 | 41 | 0 |
| 1979 | 19 | 0 |
| 1980 | 32 | 0 |
| 1981 | 38 | 0 |
| 1982 | 40 | 0 |
| 1983 | 37 | 0 |
| 1984 | 44 | 0 |
| 1985 | 32 | 0 |
| 1986 | 32 | 0 |
| 1987 | 33 | 0 |
| 1988 | 26 | 0 |
| 1989 | 51 | 0 |
| 1990 | 46 | 0 |
| 1991 | 36 | 0 |
| 1992 | 29 | 0 |
| 1993 | 36 | 0 |
| 1994 | 42 | 0 |
| 1995 | 29 | 0 |
| 1996 | 34 | 0 |
| 1997 | 39 | 0 |
| 1998 | 50 | 0 |
| 1999 | 45 | 0 |
| 2000 | 68 | 0 |
| 2001 | 76 | 34 |
| 2002 | 79 | 91 |
| 2003 | 69 | 134 |
| 2004 | 98 | 153 |
| 2005 | 112 | 241 |
| 2006 | 149 | 242 |
| 2007 | 96 | 294 |
| 2008 | 102 | 237 |
| 2009 | 116 | 268 |
| 2010 | 149 | 299 |
| 2011 | 126 | 269 |
| 2012 | 102 | 280 |
| 2013 | 126 | 330 |
| 2014 | 141 | 278 |
| 2015 | 154 | 244 |
| 2016 | 161 | 235 |
| 2017 | 156 | 254 |
| 2018 | 199 | 266 |
| 2019 | 237 | 331 |
| 2020 | 242 | 359 |
| 2021 | 219 | 278 |
| 2022 | 204 | 257 |
| 2023 | 199 | 247 |
| 2024 | 199 | 222 |
| 2025 | 175 | 235 |
| 2026 | 113 | 163 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28D 15/04With tubes having a capillary structure1,755
- F28D 15/0275Arrangements for coupling heat-pipes together or with other structures1,511
- F28D 15/0266With separate evaporating and condensing chambers connected by at least one conduit1,464
- F28D 15/0233The conduits having a particular shape1,443
- F28D 15/06Control arrangements therefor330
- F28D 15/0283Means for filling or sealing heat pipes286
- F28D 15/025Having non-capillary condensate return means202
- F28D 15/0241The tubes being flexible145
Recent patents
- Connector apparatus for electric charging cable6 Oct 2026US 12,755,866 B2The Board of Regents of the University of Oklahoma
- Main body sheet for vapor chamber, vapor chamber, and electronic apparatus6 Oct 2026US 12,757,355 B2Dai Nippon Printing Co.Ltd.
- Loop heat pipe for staged reentry spacecraft29 Sep 2026US 12,747,038 B1The United States of America as represented by the Secretary of the Air Force
- Heat pipe thermal expansion modification29 Sep 2026US 12,747,916 B2Westinghouse Electric Corp.
- Medical cooling device and cooling method using the same15 Sep 2026US 12,734,065 B2RecensMedical, Inc.
- Oscillating heat pipe with phase change material1 Oct 2026US 2026/0298548 A1Raytheon Company
- Oscillating heat pipe with biphilic fluid channels24 Sep 2026US 2026/0287269 A1Raytheon Company
- Heat pipe24 Sep 2026US 2026/0287270 A1Fujikura Ltd.
- Vapor chamber supporting capillary structure24 Sep 2026US 2026/0287271 A1Nidec Chaun-Choung Technology Corporation
- Oscillating heat pipes operable within high gravity force equivalent (g-force) environments24 Sep 2026US 2026/0287272 A1Raytheon Company
Most cited
By later US patents
- Electronic device806US 9,313,915 B2ASUSTek · 2016
- System for monitoring health, wellness and fitness having a method and apparatus for improved measurement of heat flow688US 6,595,929 B2BodyMedia, Inc. · 2003
- Computing infrastructure672US 8,706,914 B22014
- Active thermal control of ultrasound transducers514US 5,560,362 AAcuson Corporation · 1996
- Structure of a heat pipe237US 4,921,041 AActronics Kabushiki Kaisha · 1990