C02F 3/201
Perforated, resilient plastic diffusers
Official title: {Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses}
C02F3/201 (Perforated, resilient plastic diffusers) appears on 203 US grants and 187 published applications in this corpus.
Search patents in C02F- Granted patents
- 203
- Published applications
- 187
- Assignees
- 125
- Inventors
- 418
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 6 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 2 |
| 2002 | 3 | 5 |
| 2003 | 5 | 5 |
| 2004 | 3 | 4 |
| 2005 | 1 | 3 |
| 2006 | 5 | 4 |
| 2007 | 4 | 4 |
| 2008 | 2 | 6 |
| 2009 | 2 | 4 |
| 2010 | 5 | 5 |
| 2011 | 7 | 15 |
| 2012 | 6 | 6 |
| 2013 | 5 | 8 |
| 2014 | 4 | 8 |
| 2015 | 7 | 7 |
| 2016 | 4 | 10 |
| 2017 | 13 | 11 |
| 2018 | 8 | 4 |
| 2019 | 1 | 10 |
| 2020 | 10 | 17 |
| 2021 | 10 | 13 |
| 2022 | 6 | 11 |
| 2023 | 13 | 9 |
| 2024 | 6 | 3 |
| 2025 | 9 | 10 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Efficient nitrogen and phosphorus removal process system for mariculture tail water treatment15 Sep 2026US 12,735,339 B2Tianjin Research Institute for Water Transport Engineering, M.O.T.
- Tube diffuser and associated saddle6 Jan 2026US 12,515,970 B2Ssi Aeration, Inc.
- Nano-bubble generating apparatus and method25 Nov 2025US 12,478,927 B2Moleaer, Inc.
- Bubble generator14 Oct 2025US 12,441,641 B2Pulse Burst Systems, LLC
- Aeration system with flexible hose couplings23 Sep 2025US 12,421,146 B2Artemis Rubber Technology Inc.
- Diffuser assembly for use in wastewater treatment21 May 2026US 2026/0138100 A2Ssi Aeration, Inc.
- Tube diffuser and associated saddle9 Apr 2026US 2026/0097980 A1
- Systems and methods of gas infusion for wastewater treatment8 Jan 2026US 2026/0008019 A1Prosper Technologies, LLC
- Device for filtering and purifying greywater or other wastewater to generate a new, clean and safe water source by means of a biological filter20 Nov 2025US 2025/0353763 A1Pontificia Universidad Catolica De Chile
- Diffuser assembly for use in wastewater treatment18 Sep 2025US 2025/0288961 A1
Most cited
By later US patents
- Cyclic aeration system for submerged membrane modules132US 6,245,239 B1Zenon Environmental Inc. · 2001
- Method and apparatus for waste digestion using multiple biological processes124US 5,626,755 AMicronair, Inc. · 1997
- Cyclic aeration system for submerged membrane modules109US 6,550,747 B2Zenon Environmental Inc. · 2003
- Cyclic aeration system for submerged membrane modules95US 6,706,189 B2Zenon Environmental Inc. · 2004
- Sparger86US 5,858,283 A1999