F28C 1/00
Direct-contact trickle coolers
Official title: Direct-contact trickle coolers, e.g. cooling towers (building construction E04H5/12; enclosed spaces cooled by trickle F25; components parts of trickle coolers F28F25/00; {indirect-contact cooling towers F28B1/06})
F28C1/00 (Direct-contact trickle coolers) appears on 608 US grants and 570 published applications in this corpus.
Search patents in F28C- Granted patents
- 608
- Published applications
- 570
- Assignees
- 325
- Inventors
- 1,107
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 16 | 0 |
| 1978 | 14 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 13 | 0 |
| 1982 | 7 | 0 |
| 1983 | 10 | 0 |
| 1984 | 10 | 0 |
| 1985 | 9 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 10 | 0 |
| 1989 | 6 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 4 |
| 2002 | 6 | 5 |
| 2003 | 6 | 10 |
| 2004 | 5 | 9 |
| 2005 | 6 | 6 |
| 2006 | 5 | 12 |
| 2007 | 7 | 13 |
| 2008 | 5 | 5 |
| 2009 | 6 | 21 |
| 2010 | 7 | 9 |
| 2011 | 6 | 18 |
| 2012 | 8 | 15 |
| 2013 | 8 | 21 |
| 2014 | 15 | 28 |
| 2015 | 17 | 28 |
| 2016 | 23 | 31 |
| 2017 | 23 | 42 |
| 2018 | 21 | 40 |
| 2019 | 37 | 37 |
| 2020 | 39 | 39 |
| 2021 | 27 | 41 |
| 2022 | 36 | 39 |
| 2023 | 32 | 26 |
| 2024 | 27 | 26 |
| 2025 | 21 | 25 |
| 2026 | 10 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28C 1/14Comprising also a non-direct contact heat exchange209
- F28C 1/02Direct-contact trickle coolers: with counter-current only117
- F28C 1/04Direct-contact trickle coolers: with cross-current only97
- F28C 2001/006Systems comprising cooling towersIndexing code93
- F28C 1/16Arrangements for preventing condensation, precipitation or mist formation, outside the cooler70
- F28C 1/10Arrangements for suppressing noise16
- F28C 1/003Comprising outlet ducts for exhaust gases14
- F28C 1/06Direct-contact trickle coolers: with both counter-current and cross-current12
Recent patents
- Liquid collector25 Aug 2026US 12,714,959 B2Baltimore Aircoil Company, Inc.
- System and methods utilizing fluid coolers and chillers to perform in-series heat rejection and trim cooling25 Aug 2026US 12,716,598 B2Inertech IP LLC
- Systems, methods and devices for cooling tower maintenance and repair4 Aug 2026US 12,698,941 B2
- Method for utilizing multiple simultaneous independent sources of water in a cooling tower28 Jul 2026US 12,692,175 B2Ecolab USA Inc.
- Fog dissipation device and cooling tower28 Jul 2026US 12,693,075 B2Shandong Beno Cooling Equipment Co., Ltd.
- Heat rejection apparatus17 Sep 2026US 2026/0276309 A1
- Microstructure for a fill sheet13 Aug 2026US 2026/0233191 A1Brentwood Industries, Inc.
- Modular heat transfer systems and associated methods of heat transfer6 Aug 2026US 2026/0227136 A1Spx Cooling Tech, LLC
- Heat exchange device30 Jul 2026US 2026/0218985 A1Shenzhen Envicool Technology Co., Ltd.
- Co2 sequester system for cooling towers23 Jul 2026US 2026/0208101 A1Hitachi Energy Ltd
Most cited
By later US patents
- Combination direct and indirect closed circuit evaporative heat exchanger with blow-through fan99US 5,724,828 ABaltimore Aircoil Company, Inc. · 1998
- Tower packing material and method91US 4,604,247 AGlitsch, Inc. · 1986
- Method of and apparatus for intermediate lamella vapor liquid contact83US 4,597,916 AGlitsch, Inc. · 1986
- Electronic device cooling system75US 8,223,495 B1Exaflop LLC · 2012
- Combination direct and indirect closed circuit evaporative heat exchanger72US 5,435,382 ABaltimore Aircoil Company, Inc. · 1995