C02F 3/34
Biological treatment of water, waste water, or sewage: characterised by the microorganisms
Official title: characterised by the microorganisms used
C02F3/34 (Biological treatment of water, waste water, or sewage: characterised by the microorganisms) appears on 1,932 US grants and 1,836 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,932
- Published applications
- 1,836
- Assignees
- 1,313
- Inventors
- 4,938
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 15 | 0 |
| 1978 | 9 | 0 |
| 1979 | 9 | 0 |
| 1980 | 24 | 0 |
| 1981 | 20 | 0 |
| 1982 | 15 | 0 |
| 1983 | 15 | 0 |
| 1984 | 21 | 0 |
| 1985 | 16 | 0 |
| 1986 | 13 | 0 |
| 1987 | 17 | 0 |
| 1988 | 21 | 0 |
| 1989 | 25 | 0 |
| 1990 | 23 | 0 |
| 1991 | 26 | 0 |
| 1992 | 24 | 0 |
| 1993 | 39 | 0 |
| 1994 | 46 | 0 |
| 1995 | 49 | 0 |
| 1996 | 51 | 0 |
| 1997 | 39 | 0 |
| 1998 | 50 | 0 |
| 1999 | 50 | 0 |
| 2000 | 58 | 0 |
| 2001 | 52 | 10 |
| 2002 | 44 | 31 |
| 2003 | 37 | 43 |
| 2004 | 28 | 44 |
| 2005 | 26 | 56 |
| 2006 | 23 | 45 |
| 2007 | 44 | 43 |
| 2008 | 34 | 72 |
| 2009 | 31 | 56 |
| 2010 | 34 | 71 |
| 2011 | 41 | 64 |
| 2012 | 39 | 58 |
| 2013 | 49 | 72 |
| 2014 | 41 | 86 |
| 2015 | 48 | 80 |
| 2016 | 50 | 78 |
| 2017 | 60 | 95 |
| 2018 | 69 | 82 |
| 2019 | 73 | 87 |
| 2020 | 59 | 114 |
| 2021 | 78 | 109 |
| 2022 | 60 | 93 |
| 2023 | 54 | 98 |
| 2024 | 67 | 113 |
| 2025 | 56 | 90 |
| 2026 | 43 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C02F 3/342Characterised by the enzymes used346
- C02F 3/348Characterised by the way or the form in which the microorganisms are291
- C02F 3/341Consortia of bacteria275
- C02F 3/345For biological oxidation or reduction of sulfur compounds178
- C02F 3/344For digestion of mineral oil124
- C02F 3/343For digestion of grease, fat, oil97
- C02F 3/347Use of yeasts or fungi48
- C02F 3/346Iron bacteria33
Recent patents
- System and method for leachate biodegradation through aquatic microorganism digestion6 Oct 2026US 12,753,098 B1
- Electrochemical nitrogen and phosphorus removal device and method29 Sep 2026US 12,747,176 B2Beijing Drainage Group Co., Ltd
- Process for in-line mineralisation and carbonation of demineralised water29 Sep 2026US 12,747,177 B2Flamingo Holding SA
- Method of reducing nitrogen oxide concentration in sample, bioreactor, and plug flow reactor29 Sep 2026US 12,747,458 B2Korea Advanced Institute of Science and Technology
- 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
- Microbial Composite Bacteria for Sludge Reduction in Biochemical Systems, Preparation Method Thereof, and Application of Microbial Agent for Sludge Reduction in Biochemical Systems8 Oct 2026US 2026/0308033 A1
- 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
- Systems for catalytically removing per- and polyfluoroalkyl substances from a fluid and related methods1 Oct 2026US 2026/0296939 A1Arizona Board of Regents on behalf of Arizona State University
- Production of carbon compounds1 Oct 2026US 2026/0297505 A1
- Systems and methods of gas remediation and sediment harvesting17 Sep 2026US 2026/0274725 A1Floating Island International Inc.
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Anaerobic digester system158US 6,299,774 B12001
- Method for processing lignocellulosic material150US 6,555,350 B2Forskningscenter Riso · 2003
- Method and apparatus for treating hydrocarbon and halogenated hydrocarbon contaminated ground and ground water128US 4,401,569 AGroundwater Decontamination Systems, Inc. · 1983
- Two phase anaerobic digestion107US 4,022,665 AInstitute of Gas Technology · 1977