C02F 11/02
Biological treatment
C02F11/02 (Biological treatment) appears on 693 US grants and 1,013 published applications in this corpus.
Search patents in C02F- Granted patents
- 693
- Published applications
- 1,013
- Assignees
- 595
- Inventors
- 1,988
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 3 |
| 2002 | 13 | 12 |
| 2003 | 9 | 11 |
| 2004 | 13 | 17 |
| 2005 | 12 | 22 |
| 2006 | 8 | 29 |
| 2007 | 17 | 22 |
| 2008 | 16 | 27 |
| 2009 | 20 | 37 |
| 2010 | 21 | 38 |
| 2011 | 27 | 30 |
| 2012 | 21 | 46 |
| 2013 | 22 | 43 |
| 2014 | 14 | 39 |
| 2015 | 28 | 46 |
| 2016 | 23 | 66 |
| 2017 | 38 | 46 |
| 2018 | 27 | 36 |
| 2019 | 41 | 54 |
| 2020 | 38 | 51 |
| 2021 | 35 | 79 |
| 2022 | 53 | 59 |
| 2023 | 41 | 62 |
| 2024 | 47 | 53 |
| 2025 | 45 | 48 |
| 2026 | 21 | 37 |
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
- Reduced-headspace digester1 Sep 2026US 12,722,994 B2Suez International
- Apparatus, system and method for automated food waste processing1 Sep 2026US 12,723,008 B2Ecotone Renewables PBC
- System and method for improved anaerobic digestion18 Aug 2026US 12,709,563 B2Topstone Ventures, LLC
- Apparatus and method for treating oil-containing sludge with metal-friched biochar4 Aug 2026US 12,698,227 B2Shenzhen Polytechnic
- 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
- Aerobic biological wastewater treatment in a continuous flow reactor24 Sep 2026US 2026/0285722 A1HaskoningDHV Nederland B.V.
- Bioreactor with membrane filtration and methods for treating wastewater10 Sep 2026US 2026/0265098 A1Bl Technologies, Inc.
- Exploitation Of Wine Processing Waste By Means Of Integrated Biological Processes Of Anaerobic Digestion And Microalgae Culture10 Sep 2026US 2026/0265101 A1Università Ca' Foscari Venezia
- Method for highly efficient in-situ enrichment of anaerobic ammonium oxidizing bacteria10 Sep 2026US 2026/0265107 A1Tongji University
Most cited
By later US patents
- Automated peritoneal dialysis system and process with in-line sterilization of dialysate252US 6,758,975 B2Piedmont Renal Clinic, PA · 2004
- Anaerobic digester system158US 6,299,774 B12001
- Continuous counter-current organosolv processing of lignocellulosic feedstocks95US 7,465,791 B1Lignol Innovations Ltd. · 2008
- System and method for improved treatment of wastewater82US 6,444,124 B12002
- Organic slurry treatment process70US 6,692,642 B2International Waste Management Systems · 2004