C02F 3/2886
Two story combinations of the imhoff tank type
Official title: {Two story combinations of the Imhoff tank type}
C02F3/2886 (Two story combinations of the imhoff tank type) appears on 15 US grants and 8 published applications in this corpus.
Search patents in C02F- Granted patents
- 15
- Published applications
- 8
- Assignees
- 12
- Inventors
- 45
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Straight-line sewage treatment system for enhanced treatment of low C/N domestic sewage31 Mar 2026US 12,590,019 B2Tongji University
- Wastewater treatment system and gas liquid partition valve10 Sep 2019US 10,407,329 B2National Institute for Environmental Studies
- Upflow bioreactor with septum and pressure release mechanism20 Apr 2010US 7,699,976 B2Utah State University
- Anaerobic bioreactor for the wastewater-treatment plant4 Apr 2006US 7,022,226 B2Global Technology DT. Inc.
- Three-phase separator and installation for biological purification of effluent6 Jul 2004US 6,758,886 B2Paques Water Systems B.V.
- Straight-line sewage treatment system for enhanced treatment of low c/n domestic sewage21 Mar 2024US 2024/0092664 A1Tongji University
- Foldable and removable partition assembly for septic tank30 May 2019US 2019/0160396 A1Presby Patent Trust
- Wastewater treatment system and gas liquid partition valve31 Jan 2019US 2019/0031542 A1National Institute for Environmental Studies
- Method of selenium removal from an aqueous source27 Sep 2012US 2012/0241376 A1
- Vessel and system for biological regeneration of ion exchange and absorptive media21 May 2009US 2009/0130742 A1Shaw Environmental & Infrastructure, Inc.
Most cited
By later US patents
- Waste water treatment system36US 5,352,357 A1994
- Apparatus for anaerobic purification of waste water24US 5,013,431 AMeyn Machinefabriek B.V. · 1991
- Settling device for a fluid containing liquid, gas and particulate material, as well as a cleaning device provided herewith and a method for cleaning waste water16US 5,904,850 APaques B. V. · 1999
- Combined anaerobic reactor and settler13US 4,165,285 AN.V. Centrale Suiker Maatschappij · 1979
- Apparatus for the anaerobic purification of waste water13US 4,253,956 AN.V. Centrale Suiker Maatschappij · 1981