C02F 3/26
Using pure oxygen or oxygen-rich gas
Official title: using pure oxygen or oxygen-rich gas
C02F3/26 (Using pure oxygen or oxygen-rich gas) appears on 243 US grants and 100 published applications in this corpus.
Search patents in C02F- Granted patents
- 243
- Published applications
- 100
- Assignees
- 131
- Inventors
- 391
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 12 | 0 |
| 1978 | 17 | 0 |
| 1979 | 10 | 0 |
| 1980 | 11 | 0 |
| 1981 | 11 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 9 | 0 |
| 2000 | 0 | 0 |
| 2001 | 6 | 1 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 4 |
| 2006 | 3 | 5 |
| 2007 | 3 | 2 |
| 2008 | 3 | 7 |
| 2009 | 3 | 3 |
| 2010 | 6 | 1 |
| 2011 | 0 | 3 |
| 2012 | 1 | 4 |
| 2013 | 2 | 6 |
| 2014 | 0 | 4 |
| 2015 | 1 | 7 |
| 2016 | 4 | 2 |
| 2017 | 3 | 2 |
| 2018 | 2 | 3 |
| 2019 | 4 | 4 |
| 2020 | 6 | 7 |
| 2021 | 3 | 10 |
| 2022 | 4 | 8 |
| 2023 | 8 | 3 |
| 2024 | 6 | 4 |
| 2025 | 2 | 3 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for leachate biodegradation through aquatic microorganism digestion6 Oct 2026US 12,753,098 B1
- System and method for wastewater treatment control through microorganism settling optimization6 Oct 2026US 12,753,099 B1
- Nanobubbles for anaerobic processes10 Feb 2026US 12,545,888 B2Moleaer, Inc.
- Method for wastewater treatment control through microorganism metabolic pathway optimization6 Jan 2026US 12,515,969 B2
- Method for optimizing the energy consumption of an aerator in the field of water treatment23 Dec 2025US 12,503,381 B2L'Air Liquide Societe Anonyme Pour L'Etude Et L' Exploitation Des Procedes George Claude
- 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
- Systems and methods for water treatment16 Jul 2026US 2026/0200775 A1National University Corporation Kanazawa University
- System for valve-based wastewater treatment control through microorganism metabolic pathway optimization7 May 2026US 2026/0125300 A1
- Retrofittable system for wastewater treatment through prioritization of microorganism digestion function1 Jan 2026US 2026/0001795 A1
- Oxygen infusion module for wastewater treatment24 Apr 2025US 2025/0128973 A1Prosper Technologies, LLC
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
- Apparatus for oxygenating wastewater108US 7,008,535 B1DynamOx, Inc. · 2006
- Apparatus and process for removing ammonia nitrogen from waste water86US 4,009,099 AEcolotrol, Inc. · 1977
- Microbubbles of oxygen83US 6,689,262 B2Aqua Innovation, Inc. · 2004