C02F 11/04
Anaerobic treatment
Official title: Anaerobic treatment; Production of methane by such processes
C02F11/04 (Anaerobic treatment) appears on 565 US grants and 841 published applications in this corpus.
Search patents in C02F- Granted patents
- 565
- Published applications
- 841
- Assignees
- 494
- Inventors
- 1,599
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 1 |
| 2002 | 9 | 11 |
| 2003 | 6 | 6 |
| 2004 | 3 | 10 |
| 2005 | 8 | 19 |
| 2006 | 3 | 23 |
| 2007 | 12 | 19 |
| 2008 | 14 | 22 |
| 2009 | 16 | 35 |
| 2010 | 19 | 33 |
| 2011 | 24 | 27 |
| 2012 | 19 | 40 |
| 2013 | 20 | 40 |
| 2014 | 13 | 35 |
| 2015 | 24 | 39 |
| 2016 | 19 | 56 |
| 2017 | 34 | 44 |
| 2018 | 24 | 32 |
| 2019 | 39 | 46 |
| 2020 | 34 | 46 |
| 2021 | 30 | 60 |
| 2022 | 44 | 40 |
| 2023 | 32 | 54 |
| 2024 | 38 | 42 |
| 2025 | 34 | 36 |
| 2026 | 16 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Anaerobic digester with self-delivery of accumulated solids16 Jun 2026US 12,655,048 B2Virginia Tech Intellectual Properties, Inc.
- 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
- Anaerobic digester monitoring system and method for biological control10 Sep 2026US 2026/0265108 A1Valkyrie Analytics
- Mixing and solids removal system for racetrack digester and racetrack digester including same27 Aug 2026US 2026/0250173 A1Montauk Energy Holdings, LLC
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
- Integrated anaerobic digester system68US 6,569,332 B22003