F28F 25/12
Ducts
Official title: Ducts; Guide vanes, e.g. for carrying currents to distinct zones
F28F25/12 (Ducts) appears on 58 US grants and 49 published applications in this corpus.
Search patents in F28F- Granted patents
- 58
- Published applications
- 49
- Assignees
- 47
- Inventors
- 134
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 2 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 2 |
| 2018 | 1 | 5 |
| 2019 | 3 | 2 |
| 2020 | 6 | 5 |
| 2021 | 3 | 5 |
| 2022 | 4 | 4 |
| 2023 | 3 | 2 |
| 2024 | 2 | 6 |
| 2025 | 3 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Fog dissipation device and cooling tower28 Jul 2026US 12,693,075 B2Shandong Beno Cooling Equipment Co., Ltd.
- Heat pump system17 Mar 2026US 12,578,129 B2Tyco Fire & Security GmbH
- Cooling tower23 Sep 2025US 12,419,661 B2Aggreko, LLC
- Components (air inlet louver panels) for cooling water management systems19 Aug 2025US 12,392,568 B1Tower Guard, LLC
- Components (air inlet louver panels) for cooling water management systems30 Apr 2026US 2026/0118074 A1
- Fluid Flow Augmenting Device for a Fluid Circulation System27 Feb 2025US 2025/0067465 A12874108 Ontario Limited
- Sustaining cooling tower performance through air side inlet condition control19 Dec 2024US 2024/0418460 A1Saudi Arabian Oil Company
- Louvers for cooling tower, cooling tower systems, and methods of preventing cooling tower from freezing19 Sep 2024US 2024/0310132 A1Inner Mongolia Helin Power Generation Co., Ltd.
- Drift eliminator and method of making15 Aug 2024US 2024/0271872 A1Brentwood Industries, Inc.
Most cited
By later US patents
- Bottom vented wet-dry water cooling tower55US 4,076,771 AThe Marley Cooling Tower Company · 1978
- Suction elbow provided with built-in guide blades32US 6,290,266 B12001
- Cooling tower with direct and indirect cooling sections27US 7,484,718 B2Baltimore Aircoil Company, Inc. · 2009
- Confined vortex cooling tower23US 4,397,793 A1983
- Cooling tower21US 3,944,636 AGEA Luftkuehlergesellschaft Happel GmbH & Co. · 1976