F24F 8/142
Treatment of used liquid
Official title: Treatment of used liquid, e.g. cleaning for recycling
F24F8/142 (Treatment of used liquid) appears on 24 US grants and 25 published applications in this corpus.
Search patents in F24F- Granted patents
- 24
- Published applications
- 25
- Assignees
- 16
- Inventors
- 53
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 4 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 5 |
| 2022 | 2 | 0 |
| 2023 | 3 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Air filtration apparatus11 Feb 2025US 12,222,134 B2
- Air flow vessel and spray ring air purification device7 Feb 2023US 11,573,018 B2King Fahd University of Petroleum and Minerals
- Method using spray ring in an enclosed air flow for purification10 Jan 2023US 11,549,705 B2King Fahd University of Petroleum and Minerals
- Air treatment device configured for cyclone flow and water contact3 Jan 2023US 11,543,141 B2King Fahd University of Petroleum and Minerals
- Cyclonic vessel air purification and humidity device8 Nov 2022US 11,493,217 B2King Fahd University of Petroleum and Minerals
- Pollution and air cleaning device3 Jul 2025US 2025/0216101 A1
- Air Filtration Apparatus11 Jan 2024US 2024/0011653 A1
- Air treatment apparatus with electrostatic precipitation function6 Jul 2023US 2023/0213220 A1Woco GmbH & Co. KG
- Method using spray ring in an enclosed air flow for purification16 Dec 2021US 2021/0389001 A1King Fahd University of Petroleum and Minerals
- Cyclonic vessel air purification and humidity device2 Dec 2021US 2021/0372641 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Heating, ventilation and air conditioning unit with automatically controlled water spray air purification system48US 5,389,120 A1995
- Air purification system and method using an ultrasonic wave39US 9,403,114 B2Empire Technology Development LLC · 2016
- Air cleaner31US 6,946,021 B2Kabushiki Kaisha Sunseal · 2005
- Liquid spray air purification and controlled humidification apparatus with air quality monitor and controller25US 5,531,801 A1996
- Liquid spray air purification and controlled humidification apparatus19US 5,531,800 A1996