C02F 3/14
Using surface aeration
Official title: using surface aeration
C02F3/14 (Using surface aeration) appears on 203 US grants and 99 published applications in this corpus.
Search patents in C02F- Granted patents
- 203
- Published applications
- 99
- Assignees
- 109
- Inventors
- 310
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 10 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 5 |
| 2005 | 0 | 4 |
| 2006 | 1 | 2 |
| 2007 | 5 | 6 |
| 2008 | 3 | 12 |
| 2009 | 4 | 5 |
| 2010 | 8 | 1 |
| 2011 | 5 | 1 |
| 2012 | 5 | 2 |
| 2013 | 1 | 11 |
| 2014 | 1 | 5 |
| 2015 | 4 | 3 |
| 2016 | 7 | 6 |
| 2017 | 7 | 6 |
| 2018 | 2 | 8 |
| 2019 | 6 | 3 |
| 2020 | 6 | 3 |
| 2021 | 4 | 5 |
| 2022 | 6 | 4 |
| 2023 | 0 | 0 |
| 2024 | 3 | 2 |
| 2025 | 2 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recirculating aquaculture mixed-cell raceway system14 Jul 2026US 12,677,808 B2
- Aerator10 Feb 2026US 12,545,609 B2Patrick Charles Pty Ltd
- Method for optimizing the energy consumption of an aerator in the field of water treatment23 Dec 2025US 12,503,381 B2L'Air Liquide Societe Anonyme Pour L'Etude Et L' Exploitation Des Procedes George Claude
- Combined mixed-cell and raceway aquaculture device, system and method of use thereof, and method for growing fish thereby25 Nov 2025US 12,478,047 B2Jlh Consulting Inc.
- Container-type apparatus with a suspended particle system for wastewater treatment10 Dec 2024US 12,161,953 B2Wesdon-Tienda Environmental Sciences Co. Ltd.
- Mechanical wave generator to affect water qulaity25 Dec 2025US 2025/0388491 A1
- Recirculating Aquaculture Mixed-Cell Raceway System11 Sep 2025US 2025/0280802 A1
- Oxygenation assembly for aquaculture8 May 2025US 2025/0144579 A1Poseidon Ocean Systems Ltd.
- Municipal sewage nitrogen removal treatment device and method10 Oct 2024US 2024/0336505 A1Suzhou University of Science and Technology
- Submersible Aeration Apparatus21 Mar 2024US 2024/0091720 A1Tsurumi Manufacturing Co., Ltd.
Most cited
By later US patents
- Process for treating BOD-containing wastewater84US 6,592,762 B2United States Filter Corporation · 2003
- Device and process for liquid treatment76US 5,948,326 ABattelle Memorial Institute · 1999
- Centrifugal rotating disc assembly for biological waste water treatment apparatus56US 4,268,385 ADengyosha Engineering Co., Inc. · 1981
- Rotary surface aerator with adjustable liquid transporting units47US 4,465,645 A1984
- Aeration device43US 4,290,885 A1981