C02F 3/208
Membrane aeration
Official title: {Membrane aeration (C02F3/201 takes precedence)}
C02F3/208 (Membrane aeration) appears on 104 US grants and 115 published applications in this corpus.
Search patents in C02F- Granted patents
- 104
- Published applications
- 115
- Assignees
- 76
- Inventors
- 282
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 3 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 4 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 0 |
| 2010 | 2 | 5 |
| 2011 | 1 | 4 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 5 | 3 |
| 2015 | 2 | 3 |
| 2016 | 2 | 8 |
| 2017 | 2 | 6 |
| 2018 | 1 | 9 |
| 2019 | 6 | 9 |
| 2020 | 8 | 8 |
| 2021 | 5 | 8 |
| 2022 | 4 | 12 |
| 2023 | 12 | 6 |
| 2024 | 6 | 9 |
| 2025 | 4 | 5 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- MABR-based method for treating rare earth mine tailwater12 May 2026US 12,623,940 B2Guangdong University of Technology
- Process for water treatment using immersed gas transfer membranes17 Mar 2026US 12,577,137 B2Bl Technologies, Inc.
- Submerged membrane unit with single drop aeration24 Feb 2026US 12,559,397 B2
- Method and system for wastewater treatment10 Feb 2026US 12,545,610 B2Fluence Water Products and Innovation Ltd
- Membrane filter and filtering method23 Sep 2025US 12,420,236 B2Membion GmbH
- Bioreactor with membrane filtration and methods for treating wastewater10 Sep 2026US 2026/0265098 A1Bl Technologies, Inc.
- Floating apparatus for membrane biofilm reactor and process for water treatment25 Jun 2026US 2026/0176180 A1Bl Technologies, Inc.
- Water treatment apparatus23 Apr 2026US 2026/0109623 A1Kubota Corporation
- Water treatment apparatus23 Apr 2026US 2026/0109627 A1Kubota Corporation
- A system and process for wastewater treatment25 Sep 2025US 2025/0296861 A1Fluence Water Products and Innovation Ltd
Most cited
By later US patents
- Membrane module for gas transfer and membrane supported biofilm process99US 6,645,374 B2Zenon Environmental Inc. · 2003
- Support aerated biofilm reactor91US 5,116,506 AOregon State University · 1992
- Method of gasifying or degasifying a liquid containing cells88US 5,902,747 ACompact Membrane Systems, Inc. · 1999
- Method of gasifying or degasifying a liquid74US 5,876,604 ACompact Membrane Systems, Inc. · 1999
- Granular activated carbon-sequencing batch biofilm reactor (GAC-SBBR)64US 5,126,050 ASBR Technologies, Inc. · 1992