C02F 3/06
Using submerged filters
Official title: using submerged filters
C02F3/06 (Using submerged filters) appears on 667 US grants and 467 published applications in this corpus.
Search patents in C02F- Granted patents
- 667
- Published applications
- 467
- Assignees
- 472
- Inventors
- 1,483
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 11 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 11 | 0 |
| 1990 | 13 | 0 |
| 1991 | 19 | 0 |
| 1992 | 19 | 0 |
| 1993 | 25 | 0 |
| 1994 | 24 | 0 |
| 1995 | 22 | 0 |
| 1996 | 27 | 0 |
| 1997 | 27 | 0 |
| 1998 | 24 | 0 |
| 1999 | 15 | 0 |
| 2000 | 12 | 0 |
| 2001 | 13 | 2 |
| 2002 | 18 | 14 |
| 2003 | 11 | 17 |
| 2004 | 20 | 17 |
| 2005 | 8 | 18 |
| 2006 | 13 | 24 |
| 2007 | 11 | 23 |
| 2008 | 18 | 18 |
| 2009 | 17 | 27 |
| 2010 | 17 | 15 |
| 2011 | 9 | 22 |
| 2012 | 10 | 16 |
| 2013 | 10 | 19 |
| 2014 | 11 | 18 |
| 2015 | 15 | 20 |
| 2016 | 11 | 22 |
| 2017 | 15 | 22 |
| 2018 | 15 | 22 |
| 2019 | 23 | 18 |
| 2020 | 18 | 24 |
| 2021 | 16 | 16 |
| 2022 | 13 | 12 |
| 2023 | 12 | 20 |
| 2024 | 11 | 20 |
| 2025 | 9 | 9 |
| 2026 | 11 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aerated biological filtration process for water treatment with a view to reducing the nitrogen content (NGL) of said water with reduction of carbon-source and aeration requirements22 Sep 2026US 12,741,895 B2Veolia Water Solutions & Technologies Support
- 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.
- System and method for continuous metabolism of 1,4-dioxane9 Jun 2026US 12,649,676 B2The Florida State University Research Foundation, Inc.
- Biofilter with shaped underdrain assembly12 May 2026US 12,623,939 B2Johnson Screens, Inc.
- MABR-based method for treating rare earth mine tailwater12 May 2026US 12,623,940 B2Guangdong University of Technology
- System and method for methane elimination in septic systems and method to create carbon credits or their equivalent1 Oct 2026US 2026/0296935 A1
- Water treatment system27 Aug 2026US 2026/0250157 A1Evoqua Water Technologies LLC
- Stormwater management system for urban storage and recovery13 Aug 2026US 2026/0234042 A1
- Waste Water Treatment by the Cleanbox Module6 Aug 2026US 2026/0225930 A1
- Methods and systems for producing water from a waste stream9 Jul 2026US 2026/0193118 A1Cambrian Innovation, Inc.
Most cited
By later US patents
- Process and apparatus for removal of organic pollutants from waste water104US 5,217,616 AAllied-Signal Inc. · 1993
- Integrated closed loop system for industrial water purification85US 7,001,519 B2Greenfish AB · 2006
- Compact biofilter for drinking water treatment83US 5,032,261 ADufresne-Henry, Inc. · 1991
- Automated closed recirculating aquaculture filtration system and method83US 5,961,831 ABoard of Regents, The University of Texas System · 1999
- Automated closed recirculating aquaculture filtration system83US 6,171,480 B2Board of Regents, The University of Texas System · 2001