C02F 2209/16
Total nitrogen
Official title: Total nitrogen (tkN-N)
C02F2209/16 (Total nitrogen) appears on 77 US grants and 137 published applications in this corpus.
Search patents in C02F- Granted patents
- 77
- Published applications
- 137
- Assignees
- 103
- Inventors
- 409
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 2 |
| 2005 | 2 | 0 |
| 2006 | 1 | 3 |
| 2007 | 2 | 3 |
| 2008 | 2 | 2 |
| 2009 | 1 | 2 |
| 2010 | 3 | 4 |
| 2011 | 1 | 6 |
| 2012 | 3 | 4 |
| 2013 | 0 | 6 |
| 2014 | 4 | 3 |
| 2015 | 3 | 7 |
| 2016 | 1 | 5 |
| 2017 | 4 | 8 |
| 2018 | 0 | 3 |
| 2019 | 1 | 2 |
| 2020 | 4 | 12 |
| 2021 | 8 | 8 |
| 2022 | 4 | 12 |
| 2023 | 4 | 11 |
| 2024 | 8 | 15 |
| 2025 | 6 | 8 |
| 2026 | 7 | 9 |
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
- System and method for treating nitrate nitrogen sewage by constructed wetland15 Sep 2026US 12,735,336 B2Southern University of Science and Technology
- Process and system for simultaneous nitrification and denitrification2 Jun 2026US 12,643,803 B2Fluence Water Products and Innovation Ltd
- Systems and methods for creating and segmenting treatment processes12 May 2026US 12,623,938 B2Enviromix, Inc.
- Micro-polluted water body treatment method based on aquatic forest system construction5 May 2026US 12,617,703 B2Shanghai Aquatic Technology Co., Ltd.
- Two-sludge water reuse process8 Oct 2026US 2026/0308030 A1
- Control device, control method, and control program20 Aug 2026US 2026/0242254 A1Yokogawa Electric Corporation
- Analysis device, analysis method, analysis program, and water treatment system20 Aug 2026US 2026/0242255 A1Yokogawa Electric Corporation
- Fermentation device for recovering carboxylic acids while reducing greenhouse gas emissions30 Jul 2026US 2026/0218106 A1Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.
- Process and system for simultaneous nitrification and denitrification19 Mar 2026US 2026/0078035 A1Fluence Water Products and Innovation Ltd
Most cited
By later US patents
- Low oxygen organic waste bioconversion system17US 6,689,274 B1Bion Technologies, Inc. · 2004
- Method for purification of wastewater14US 5,372,720 ANordic Water Products AB · 1994
- Phased activated sludge system14US 7,156,998 B2Aqua-Aerobic Systems, Inc. · 2007
- System for treating wastewater and a controlled reaction-volume module usable therein12US 7,445,715 B2Entex Technologies Inc. · 2008
- Wastewater gas reduction method11US 5,578,211 A1996