C02F 3/025
Biological purification using sources of oxygen other than air, oxygen or ozone
Official title: {Biological purification using sources of oxygen other than air, oxygen or ozone}
C02F3/025 (Biological purification using sources of oxygen other than air, oxygen or ozone) appears on 52 US grants and 25 published applications in this corpus.
Search patents in C02F- Granted patents
- 52
- Published applications
- 25
- Assignees
- 46
- Inventors
- 125
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 5 |
| 2014 | 2 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 0 |
| 2018 | 1 | 0 |
| 2019 | 2 | 3 |
| 2020 | 2 | 1 |
| 2021 | 0 | 2 |
| 2022 | 0 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for multi-deselection in wastewater treatment21 Apr 2026US 12,606,472 B2D.C. Water & Sewer Authority
- Method and apparatus for multi-deselection in wastewater treatment4 Jun 2024US 11,999,641 B2D.C. Water & Sewer Authority
- Remediation and/or restoration of an anoxic body of water21 Feb 2023US 11,584,668 B2Yara 1Nternational Asa
- Denitrification and pH control using bio-electrochemical systems1 Dec 2020US 10,851,003 B2
- Piping manifold for pulsating flow24 Nov 2020US 10,843,950 B2APTwater, Inc.
- Method and apparatus for multi-deselection in wastewater treatment10 Sep 2026US 2026/0265097 A1D.C. Water & Sewer Authority
- Apparatus and method for separating particles from waste fluid using oxygen enriched air13 Feb 2025US 2025/0051186 A1Dhi - Dalbo Holdings, Inc. & Subsidiaries
- Method and apparatus for multi-deselection in wastewater treatment8 Aug 2024US 2024/0262726 A1D.C. Water & Sewer Authority
- Composition and method for uric acid removal29 Dec 2022US 2022/0411724 A1Advanced Bacterial Sciences Limited
- Method and apparatus for multi-deselection in wastewater treatment15 Sep 2022US 2022/0289603 A1D.C. Water & Sewer Authority
Most cited
By later US patents
- Method for biological treatment of waste gases74US 4,662,900 AClair Tech B.V. · 1987
- Stimulation of biooxidation processes in subterranean formations73US 4,588,506 AFMC Corporation · 1986
- Apparatus and method for the simultaneous purification of air and water64US 5,080,793 ATauw Infra Consult B.V. · 1992
- Use of metallic peroxides in biormediation56US 5,264,018 APlant Research Laboratories · 1993
- Combined air and water pollution control system50US 4,959,084 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1990