C02F 2101/166
Nitrites
Official title: {Nitrites}
C02F2101/166 (Nitrites) appears on 107 US grants and 161 published applications in this corpus.
Search patents in C02F- Granted patents
- 107
- Published applications
- 161
- Assignees
- 139
- Inventors
- 419
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 4 |
| 2006 | 3 | 3 |
| 2007 | 2 | 2 |
| 2008 | 5 | 3 |
| 2009 | 1 | 7 |
| 2010 | 5 | 1 |
| 2011 | 1 | 8 |
| 2012 | 3 | 3 |
| 2013 | 5 | 8 |
| 2014 | 1 | 4 |
| 2015 | 2 | 8 |
| 2016 | 4 | 8 |
| 2017 | 5 | 11 |
| 2018 | 4 | 10 |
| 2019 | 6 | 7 |
| 2020 | 7 | 12 |
| 2021 | 8 | 13 |
| 2022 | 10 | 12 |
| 2023 | 7 | 10 |
| 2024 | 9 | 15 |
| 2025 | 7 | 4 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Efficient nitrogen and phosphorus removal process system for mariculture tail water treatment15 Sep 2026US 12,735,339 B2Tianjin Research Institute for Water Transport Engineering, M.O.T.
- Simultaneous nitritation and denitritation system21 Jul 2026US 12,686,625 B2Nexom
- Ozone treatment of mining effluents26 May 2026US 12,637,376 B2Asdr Canada Inc.
- Water treatment method, water treatment system, carbonized combustion material, and method for producing carbonized combustion material24 Feb 2026US 12,559,399 B2Novelgen Co., Ltd.
- Salt-tolerant heterotrophic nitrification aerobic denitrification phosphorus removal bacterial strain and application thereof13 Jan 2026US 12,522,801 B2Guangzhou University
- Process and system for degrading a chemical compound in a liquid stream1 Oct 2026US 2026/0296942 A1Aquasoil S.R.L.
- Method for formation of ammonia using diverse nitrogen based feedstocks21 May 2026US 2026/0139387 A1Colorado State University Research Foundation
- Apparatus for formation of ammonia using diverse nitrogen based feedstocks14 May 2026US 2026/0132525 A1Colorado State University Research Foundation
- Chromium and arsenic separations using porous organic frameworks16 Apr 2026US 2026/0102764 A1The Regents of the University of California
- Method of preparing amorphous iron sulfide carrier for removing nitrogen from water5 Mar 2026US 2026/0062312 A1E & Chem Solution Corp.
Most cited
By later US patents
- Wastewater treatment system and method54US 7,455,765 B2Siemens Water Technologies Corp. · 2008
- Process for removing the nitrite and/or nitrate content in water26US 4,990,266 A1991
- Process for the removal of oxynitrogen species for aqueous solutions21US 5,376,240 AOlin Corporation · 1994
- Water treatment arrangement17US 5,814,227 AGlendon Family Trust · 1998
- Electricity generation using microbial fuel cells15US 8,524,402 B2University of Southern California · 2013