C02F 3/1236
Particular type of activated sludge installations
Official title: {Particular type of activated sludge installations}
C02F3/1236 (Particular type of activated sludge installations) appears on 1,293 US grants and 1,267 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,293
- Published applications
- 1,267
- Assignees
- 684
- Inventors
- 2,711
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 22 | 0 |
| 1978 | 12 | 0 |
| 1979 | 12 | 0 |
| 1980 | 14 | 0 |
| 1981 | 15 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 14 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 10 | 0 |
| 1988 | 12 | 0 |
| 1989 | 18 | 0 |
| 1990 | 19 | 0 |
| 1991 | 14 | 0 |
| 1992 | 16 | 0 |
| 1993 | 27 | 0 |
| 1994 | 12 | 0 |
| 1995 | 15 | 0 |
| 1996 | 15 | 0 |
| 1997 | 13 | 0 |
| 1998 | 18 | 0 |
| 1999 | 17 | 0 |
| 2000 | 21 | 0 |
| 2001 | 25 | 10 |
| 2002 | 21 | 15 |
| 2003 | 18 | 35 |
| 2004 | 33 | 25 |
| 2005 | 24 | 36 |
| 2006 | 28 | 38 |
| 2007 | 29 | 46 |
| 2008 | 30 | 56 |
| 2009 | 34 | 51 |
| 2010 | 35 | 64 |
| 2011 | 45 | 63 |
| 2012 | 42 | 69 |
| 2013 | 34 | 62 |
| 2014 | 44 | 65 |
| 2015 | 39 | 67 |
| 2016 | 24 | 55 |
| 2017 | 44 | 61 |
| 2018 | 45 | 68 |
| 2019 | 66 | 47 |
| 2020 | 60 | 52 |
| 2021 | 30 | 55 |
| 2022 | 40 | 54 |
| 2023 | 37 | 50 |
| 2024 | 32 | 61 |
| 2025 | 38 | 32 |
| 2026 | 25 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device for influent distribution and thickened sludge fermentation to enhance MSBR system6 Oct 2026US 12,753,100 B2Corstar Environmental Equipment Shanghai Ltd
- Method for treating wastewater15 Sep 2026US 12,735,337 B2Mitsubishi Chemical Corporation
- Multiple chamber septic tank with a plurality of large and small access ports25 Aug 2026US 12,715,798 B2KleanTu LLC
- Method for treating a wastewater effluent in a sequencing batch reactor (SBR) having a constant level and controlled recovery25 Aug 2026US 12,715,799 B2Suez International
- Vacuum air lift systems including a fluidic oscillator28 Jul 2026US 12,692,177 B2Searen, LLC
- Two-sludge water reuse process8 Oct 2026US 2026/0308030 A1
- Microbial Composite Bacteria for Sludge Reduction in Biochemical Systems, Preparation Method Thereof, and Application of Microbial Agent for Sludge Reduction in Biochemical Systems8 Oct 2026US 2026/0308033 A1
- Process and system for simultaneous nitrification and denitrification17 Sep 2026US 2026/0274723 A1Fluence Water Products and Innovation Ltd
- Closed-loop water system with integrated atmospheric water generation and greywater recycling17 Sep 2026US 2026/0274729 A1
- Method and apparatus for multi-deselection in wastewater treatment10 Sep 2026US 2026/0265097 A1D.C. Water & Sewer Authority
Most cited
By later US patents
- System and method for detecting time-bomb malware168US 9,536,091 B2FireEye, Inc. · 2017
- System and method for detecting time-bomb malware153US 10,083,302 B1FireEye, Inc. · 2018
- Apparatus for treating activated sludge and method of cleaning it143US 5,192,456 AKubota Corporation · 1993
- Treatment of highly colored wastewaters143US 5,302,288 AZimpro Environmental, Inc. · 1994
- Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers134US 5,910,250 AZenon Environmental Inc. · 1999