C02F 3/30
Aerobic and anaerobic processes
C02F3/30 (Aerobic and anaerobic processes) appears on 1,741 US grants and 1,671 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,741
- Published applications
- 1,671
- Assignees
- 971
- Inventors
- 3,869
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 8 | 0 |
| 1978 | 9 | 0 |
| 1979 | 14 | 0 |
| 1980 | 13 | 0 |
| 1981 | 9 | 0 |
| 1982 | 11 | 0 |
| 1983 | 10 | 0 |
| 1984 | 17 | 0 |
| 1985 | 15 | 0 |
| 1986 | 9 | 0 |
| 1987 | 14 | 0 |
| 1988 | 17 | 0 |
| 1989 | 17 | 0 |
| 1990 | 21 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 26 | 0 |
| 1994 | 22 | 0 |
| 1995 | 18 | 0 |
| 1996 | 29 | 0 |
| 1997 | 25 | 0 |
| 1998 | 31 | 0 |
| 1999 | 31 | 0 |
| 2000 | 42 | 0 |
| 2001 | 34 | 6 |
| 2002 | 35 | 26 |
| 2003 | 36 | 46 |
| 2004 | 36 | 38 |
| 2005 | 26 | 59 |
| 2006 | 42 | 55 |
| 2007 | 42 | 57 |
| 2008 | 52 | 66 |
| 2009 | 44 | 58 |
| 2010 | 58 | 76 |
| 2011 | 45 | 54 |
| 2012 | 45 | 67 |
| 2013 | 38 | 77 |
| 2014 | 57 | 86 |
| 2015 | 42 | 76 |
| 2016 | 39 | 72 |
| 2017 | 69 | 64 |
| 2018 | 56 | 91 |
| 2019 | 72 | 71 |
| 2020 | 68 | 90 |
| 2021 | 57 | 103 |
| 2022 | 72 | 81 |
| 2023 | 66 | 72 |
| 2024 | 63 | 88 |
| 2025 | 60 | 51 |
| 2026 | 36 | 41 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device for influent distribution and thickened sludge fermentation to enhance MSBR system6 Oct 2026US 12,753,100 B2Corstar Environmental Equipment Shanghai Ltd
- Aerated biological filtration process for water treatment with a view to reducing the nitrogen content (NGL) of said water with reduction of carbon-source and aeration requirements22 Sep 2026US 12,741,895 B2Veolia Water Solutions & Technologies Support
- System and method for treating nitrate nitrogen sewage by constructed wetland15 Sep 2026US 12,735,336 B2Southern University of Science and Technology
- Efficient nitrogen and phosphorus removal process system for mariculture tail water treatment15 Sep 2026US 12,735,339 B2Tianjin Research Institute for Water Transport Engineering, M.O.T.
- Treating produced water for beneficial reuse8 Sep 2026US 12,729,139 B2Renovo Resources LLC
- Strain of paenibacillus glycanilyticus and application thereof in nitrogen removal treatment of nitrogen-containing aquaculture wastewater8 Oct 2026US 2026/0308511 A1Zhejiang Marine Fisheries Research Institute
- Water treatment method and water treatment apparatus1 Oct 2026US 2026/0296934 A1Organo Corporation
- Controlled flow baffles for a treatment tank1 Oct 2026US 2026/0296938 A1Parkson Corporation
- Process and system for simultaneous nitrification and denitrification17 Sep 2026US 2026/0274723 A1Fluence Water Products and Innovation Ltd
- Systems and methods for creating and segmenting treatment processes10 Sep 2026US 2026/0265095 A1Enviromix, Inc.
Most cited
By later US patents
- Controlled natural purification system for advanced wastewater treatment and protein conversion and recovery229US 4,267,038 A1981
- Process for treating waste water containing cellulose nitrate particles145US 3,939,068 AThe United States of America as represented by the Secretary of the Army · 1976
- Environmental control for biological nutrient removal in water/wastewater treatment129US 5,733,456 A1998
- Method and apparatus for waste digestion using multiple biological processes124US 5,626,755 AMicronair, Inc. · 1997
- High-rate biological waste water treatment process using activated sludge recycle123US 4,867,883 AHampton Roads Sanitation District of the Commonwealth of Virginia · 1989