C02F 2209/14
Nh3-n
C02F2209/14 (Nh3-n) appears on 219 US grants and 327 published applications in this corpus.
Search patents in C02F- Granted patents
- 219
- Published applications
- 327
- Assignees
- 183
- Inventors
- 794
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 3 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 5 |
| 2007 | 2 | 1 |
| 2008 | 5 | 1 |
| 2009 | 1 | 4 |
| 2010 | 4 | 6 |
| 2011 | 4 | 4 |
| 2012 | 5 | 9 |
| 2013 | 3 | 13 |
| 2014 | 8 | 24 |
| 2015 | 8 | 10 |
| 2016 | 10 | 18 |
| 2017 | 13 | 17 |
| 2018 | 10 | 12 |
| 2019 | 16 | 13 |
| 2020 | 8 | 25 |
| 2021 | 14 | 29 |
| 2022 | 23 | 30 |
| 2023 | 20 | 31 |
| 2024 | 17 | 28 |
| 2025 | 22 | 24 |
| 2026 | 14 | 18 |
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
- Measuring and controlling organic matter in waste water stream18 Aug 2026US 12,709,561 B2Kemira Oyj
- 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.
- Method for removing ammoniacal nitrogen from hypersaline effluents through a consortium containing high-salinity-resistant heterotrophic nitrifying and aerobic denitrifying microorganisms12 May 2026US 12,623,941 B2Petroleo Brasileiro S.A. - Petrobras
- Two-sludge water reuse process8 Oct 2026US 2026/0308030 A1
- Water treatment method and water treatment apparatus1 Oct 2026US 2026/0296934 A1Organo Corporation
- Process and system for simultaneous nitrification and denitrification17 Sep 2026US 2026/0274723 A1Fluence Water Products and Innovation Ltd
- Method for predicting wastewater treatment performance10 Sep 2026US 2026/0265083 A1Korea Advanced Institute of Science and Technology
- Systems and methods for creating and segmenting treatment processes10 Sep 2026US 2026/0265095 A1Enviromix, Inc.
Most cited
By later US patents
- Sewage treatment process with phosphorus removal88US 6,712,970 B1Enviroquip, Inc. · 2004
- Floating biological contactor43US 5,228,998 A1993
- Method of controlling waste water purification plants using multiple control functions39US 5,589,068 AI. Kruger Systems A/S · 1996
- Biochemically enchanced thermophilic treatment process38US 6,036,862 A2000
- Chemical indicator obstruction detection system and method for an aquatic environment32US 8,797,523 B2Step Ahead Innovations, Inc. · 2014