C02F 3/1252
Cylindrical tanks with horizontal axis
Official title: {Cylindrical tanks with horizontal axis}
C02F3/1252 (Cylindrical tanks with horizontal axis) appears on 29 US grants and 10 published applications in this corpus.
Search patents in C02F- Granted patents
- 29
- Published applications
- 10
- Assignees
- 16
- Inventors
- 47
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 3 |
| 2010 | 3 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Slightly heavy particle system for wastewater treatment18 Nov 2025US 12,473,217 B2Wesdon-Tienda Environmental Sciences Co. Ltd.
- Method and apparatus for anaerobic sludge digestion mixing and heat exchange27 Apr 2021US 10,988,396 B2Chicago Bridge & Iron Company
- Hoss' 4-stage biological nutrient removal (BNR) activated sludge process for removal of total phosphate and total nitrogen to a level below 1.0 mg/l without any chemical coagulation process such as alum or ferric chloride used for phosphorous removal6 May 2014US 8,715,502 B1
- Wastewater treatment system and method of using same7 Feb 2012US 8,109,488 B2DBS Manufacturing, Inc.
- Waste water purification apparatus5 Jul 2011US 7,972,500 B2Eiwa Land Environment Co., Ltd.
- Method and apparatus for anaerobic sludge digestion mixing and heat exchange7 Nov 2019US 2019/0337828 A1Chicago Bridge & Iron Company
- Slightly heavy particle system for wastewater treatment4 Oct 2018US 2018/0282185 A1Wesdon-Tienda Environmental Sciences Co. Ltd.
- Water treatment system and water treatment process15 Mar 2018US 2018/0072597 A1Mitsubishi Electric Corporation
- Wastewater treatment system and method of using same10 Dec 2009US 2009/0302487 A1DBS Manufacturing, Inc.
- Wastewater Treatment Apparatus19 Nov 2009US 2009/0283472 A1Cromaglass Corporation
Most cited
By later US patents
- Sewage treatment system70US 4,021,347 A1977
- Wastewater treatment system40US 4,325,823 ATom Graham & Associates · 1982
- Apparatus for treating sewage28US 4,070,292 AAmerican Water Recycling Company · 1978
- Apparatus for purifying waste water containing organic contaminants21US 4,054,524 AAgrotechnika, narodny podnik · 1977
- Sewage treatment apparatus20US 4,036,754 A1977