C02F 3/1278
Provisions for mixing or aeration of the mixed liquor
Official title: {Provisions for mixing or aeration of the mixed liquor}
C02F3/1278 (Provisions for mixing or aeration of the mixed liquor) appears on 482 US grants and 264 published applications in this corpus.
Search patents in C02F- Granted patents
- 482
- Published applications
- 264
- Assignees
- 277
- Inventors
- 806
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 13 | 0 |
| 1978 | 22 | 0 |
| 1979 | 15 | 0 |
| 1980 | 22 | 0 |
| 1981 | 17 | 0 |
| 1982 | 7 | 0 |
| 1983 | 9 | 0 |
| 1984 | 12 | 0 |
| 1985 | 6 | 0 |
| 1986 | 11 | 0 |
| 1987 | 11 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 12 | 0 |
| 1995 | 6 | 0 |
| 1996 | 15 | 0 |
| 1997 | 9 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 9 | 0 |
| 2001 | 11 | 3 |
| 2002 | 2 | 5 |
| 2003 | 7 | 4 |
| 2004 | 3 | 5 |
| 2005 | 4 | 5 |
| 2006 | 3 | 7 |
| 2007 | 4 | 5 |
| 2008 | 4 | 7 |
| 2009 | 7 | 8 |
| 2010 | 4 | 11 |
| 2011 | 4 | 5 |
| 2012 | 5 | 7 |
| 2013 | 7 | 12 |
| 2014 | 3 | 12 |
| 2015 | 10 | 11 |
| 2016 | 5 | 12 |
| 2017 | 7 | 18 |
| 2018 | 8 | 12 |
| 2019 | 18 | 10 |
| 2020 | 14 | 21 |
| 2021 | 9 | 23 |
| 2022 | 16 | 18 |
| 2023 | 15 | 12 |
| 2024 | 15 | 11 |
| 2025 | 11 | 12 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for leachate biodegradation through aquatic microorganism digestion6 Oct 2026US 12,753,098 B1
- System and method for cultivation of oxygenic photogranule16 Jun 2026US 12,655,049 B2University of Massachusetts
- Systems and methods for creating and segmenting treatment processes12 May 2026US 12,623,938 B2Enviromix, Inc.
- Wastewater purification apparatus and process for purifying wastewater28 Apr 2026US 12,612,320 B2Invent Umwelt-Und Verfahrenstechnik AG
- Integrated dual circulation oxidization ditch apparatus for municipal wastewater and treatment method3 Mar 2026US 12,565,435 B2Guizhou University
- Systems and methods for creating and segmenting treatment processes10 Sep 2026US 2026/0265095 A1Enviromix, Inc.
- Water treatment assembly and method16 Jul 2026US 2026/0200774 A1Totalenergies Onetech
- Concrete wastewater treatment device and system16 Jul 2026US 2026/0200776 A1
- System and Method for Supplying Return Activated Sludge4 Jun 2026US 2026/0152424 A1Xylem Water Solutions U.S.A., Inc.
- Wastewater treatment systems and methods involving a biologically active conduit21 May 2026US 2026/0138902 A1
Most cited
By later US patents
- Liquid waste oxygenation441US 5,463,176 A1995
- Thermophilic aerobic waste treatment system162US 5,656,155 AIP Holding Company · 1997
- Modular shipboard membrane bioreactor system for combined wastewater streams98US 5,254,253 AZenon Environmental Inc. · 1993
- Method and apparatus for in situ groundwater remediation82US 5,302,286 AThe Board of Trustees of the Leland Stanford Junior University · 1994
- Method and system for enriching oxygen content of water78US 4,664,680 AATEC Inc. · 1987