F28D 21/0014
The heat being recuperated from waste air or from vapors
Official title: {the heat being recuperated from waste air or from vapors (for air conditioning F24F12/001)}
F28D21/0014 (The heat being recuperated from waste air or from vapors) appears on 140 US grants and 184 published applications in this corpus.
Search patents in F28D- Granted patents
- 140
- Published applications
- 184
- Assignees
- 130
- Inventors
- 393
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 5 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 3 | 3 |
| 2011 | 1 | 5 |
| 2012 | 4 | 10 |
| 2013 | 1 | 9 |
| 2014 | 3 | 8 |
| 2015 | 5 | 7 |
| 2016 | 6 | 12 |
| 2017 | 8 | 21 |
| 2018 | 13 | 11 |
| 2019 | 15 | 13 |
| 2020 | 6 | 10 |
| 2021 | 10 | 8 |
| 2022 | 6 | 17 |
| 2023 | 8 | 15 |
| 2024 | 7 | 9 |
| 2025 | 14 | 4 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Laminate11 Aug 2026US 12,703,777 B2Daicel Corporation
- Energy recovery system11 Aug 2026US 12,704,329 B2
- Laminate12 May 2026US 12,623,444 B2Daicel Corporation
- Ventilation system for a household appliance18 Nov 2025US 12,474,065 B2Whirlpool Corporation
- Decentralized supply and exhaust unit with heat recovery23 Sep 2025US 12,422,154 B2Limited Liability Company Ventilation Systems
- Waste-heat recovery system for carbon capture30 Jul 2026US 2026/0216641 A1Valero Services, Inc.
- Heat exchange device30 Jul 2026US 2026/0218985 A1Shenzhen Envicool Technology Co., Ltd.
- Heat exchanger material and heat exchanger for cryogenic cooling systems, and a system16 Jul 2026US 2026/0202149 A1Bluefors Oy
- Heat exchanger, ventilator, and method for manufacturing heat exchanger7 May 2026US 2026/0126206 A1Daikin Industries, Ltd.
- Apparatus for disposing of organic or sewage sludge waste12 Feb 2026US 2026/0042059 A1
Most cited
By later US patents
- Cooling air cooler for a gas turbofan engine192US 4,254,618 AGeneral Electric Company · 1981
- Device for bleeding off and cooling hot air in an aircraft engine79US 5,729,969 AAerospatiale Societe Nationale Industrielle · 1998
- Heat recovery in a laundry system76US 4,275,510 A1981
- Heat reclamation device53US 5,311,930 A1994
- Compact air-to-air heat exchanger for jet engine application43US 4,187,675 AThe United States of America as represented by the Secretary of the Air Force · 1980