F28F 1/325
Fins with openings
Official title: {Fins with openings}
F28F1/325 (Fins with openings) appears on 377 US grants and 431 published applications in this corpus.
Search patents in F28F- Granted patents
- 377
- Published applications
- 431
- Assignees
- 190
- Inventors
- 1,037
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 9 | 0 |
| 1990 | 3 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 11 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 1 |
| 2002 | 4 | 4 |
| 2003 | 3 | 9 |
| 2004 | 6 | 5 |
| 2005 | 3 | 8 |
| 2006 | 10 | 5 |
| 2007 | 2 | 8 |
| 2008 | 2 | 3 |
| 2009 | 2 | 11 |
| 2010 | 1 | 11 |
| 2011 | 1 | 15 |
| 2012 | 4 | 8 |
| 2013 | 6 | 14 |
| 2014 | 3 | 9 |
| 2015 | 5 | 13 |
| 2016 | 11 | 14 |
| 2017 | 13 | 29 |
| 2018 | 12 | 35 |
| 2019 | 26 | 33 |
| 2020 | 24 | 34 |
| 2021 | 21 | 32 |
| 2022 | 28 | 28 |
| 2023 | 26 | 26 |
| 2024 | 11 | 26 |
| 2025 | 25 | 37 |
| 2026 | 13 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heat exchanger6 Oct 2026US 12,753,977 B2Kyungdong Navien Co., Ltd.
- Heat exchanger, refrigeration cycle apparatus, and method for manufacturing heat exchanger8 Sep 2026US 12,729,920 B2Mitsubishi Electric Corporation
- Water tank assembly for heating device, and heating device25 Aug 2026US 12,716,614 B2Wuhu Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- Heat exchanger and refrigeration cycle apparatus12 May 2026US 12,624,904 B2Mitsubishi Electric Corporation
- End product for air-conditioning indoor unit and air-conditioning indoor unit12 May 2026US 12,624,905 B2Carrier Corporation
- Fin, heat exchanger and water heater3 Sep 2026US 2026/0259013 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- Fin, heat exchanger and water heater3 Sep 2026US 2026/0259015 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- High performance lanced sine wave fin configuration6 Aug 2026US 2026/0227135 A1Carrier Corporation
- Heat exchanger and air handling unit6 Aug 2026US 2026/0227140 A1Daikin Industries, Ltd.
- Heat exchanger and air conditioner comprising same23 Jul 2026US 2026/0210648 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Heat exchanger141US 6,964,296 B2Modine Manufacturing Company · 2005
- Cooling apparatus75US 5,198,889 AKabushiki Kaisha Toshiba · 1993
- Heat exchanger with transpired, highly porous fins70US 6,378,605 B1Midwest Research Institute · 2002
- Integral tube and strip fin heat exchanger circuit69US 5,353,868 A1994
- Method of assembling a heat exchanger including a method of determining values of parameters in a heat exchanger, and determining whether the efficiency of the heat exchanger is acceptable41US 5,035,052 ANippondenso Co., Ltd. · 1991