C02F 3/305
Characterised by the denitrification
Official title: {characterised by the denitrification}
C02F3/305 (Characterised by the denitrification) appears on 186 US grants and 249 published applications in this corpus.
Search patents in C02F- Granted patents
- 186
- Published applications
- 249
- Assignees
- 169
- Inventors
- 678
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 1 |
| 2003 | 3 | 4 |
| 2004 | 2 | 3 |
| 2005 | 0 | 3 |
| 2006 | 2 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 2 | 4 |
| 2010 | 1 | 1 |
| 2011 | 2 | 5 |
| 2012 | 2 | 6 |
| 2013 | 2 | 9 |
| 2014 | 6 | 14 |
| 2015 | 2 | 11 |
| 2016 | 8 | 15 |
| 2017 | 14 | 13 |
| 2018 | 14 | 16 |
| 2019 | 10 | 17 |
| 2020 | 9 | 22 |
| 2021 | 17 | 25 |
| 2022 | 19 | 20 |
| 2023 | 15 | 18 |
| 2024 | 13 | 18 |
| 2025 | 14 | 13 |
| 2026 | 12 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for treating nitrate nitrogen sewage by constructed wetland15 Sep 2026US 12,735,336 B2Southern University of Science and Technology
- Apparatus and method for treating waste water1 Sep 2026US 12,722,993 B2Samsung E&A Co., Ltd.
- Multiple chamber septic tank with a plurality of large and small access ports25 Aug 2026US 12,715,798 B2KleanTu LLC
- Method for realizing advanced nitrogen removal of domestic sewage via two stage partial nitrification-anammox coupled with sulfur autotrophic denitrification25 Aug 2026US 12,715,800 B2
- Method and device for removing ammonia from exhaust air from a livestock stable4 Aug 2026US 12,697,583 B2
- Water treatment method and water treatment apparatus1 Oct 2026US 2026/0296934 A1Organo Corporation
- Method and apparatus for treating wastewater3 Sep 2026US 2026/0257952 A1Samsung E&A Co., Ltd.
- Synergetic system and method for waste treatment11 Jun 2026US 2026/0158442 A1Dürr Systems AG
- Tank configuration with enhanced denitrification7 May 2026US 2026/0125302 A1KleanTu LLC
- Systems and methods for wastewater treatment16 Apr 2026US 2026/0103415 A1Advanced Drainage Systems, Inc.
Most cited
By later US patents
- Method and apparatus for in situ groundwater remediation82US 5,302,286 AThe Board of Trustees of the Leland Stanford Junior University · 1994
- Sewage system for the treatment of segregated domestic waste water54US 4,465,594 A1984
- System and method for removing pollutants from water52US 6,652,743 B2North American Wetland Engineering, Inc. · 2003
- System for removing pollutants from water42US 6,200,469 B1North American Wetland Engineering, Inc. · 2001
- Method for removing pollutants from water38US 6,406,627 B1North American Wetland Engineering, Inc. · 2002