C02F 1/586
By removing ammoniacal nitrogen
Official title: {by removing ammoniacal nitrogen (for biological methods C02F3/00)}
C02F1/586 (By removing ammoniacal nitrogen) appears on 138 US grants and 46 published applications in this corpus.
Search patents in C02F- Granted patents
- 138
- Published applications
- 46
- Assignees
- 91
- Inventors
- 259
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 8 | 14 |
| 2018 | 7 | 10 |
| 2019 | 10 | 4 |
| 2020 | 3 | 1 |
| 2021 | 0 | 3 |
| 2022 | 3 | 3 |
| 2023 | 1 | 2 |
| 2024 | 1 | 2 |
| 2025 | 3 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of processing liquid containing ammonia nitrogen from semiconductor fabrication machine4 Nov 2025US 12,459,841 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Decomposition of struvite6 May 2025US 12,291,472 B2Easy Mining Sweden AB
- System for removal of phosphorus and nitrogen from water4 Feb 2025US 12,215,044 B2NuQuatic, LLC
- Container-type apparatus with a suspended particle system for wastewater treatment10 Dec 2024US 12,161,953 B2Wesdon-Tienda Environmental Sciences Co. Ltd.
- System and method for treating printed circuit board (PCB) wastewater19 Sep 2023US 11,760,675 B2Greentech Environment Co., Ltd.
- Ammonia-containing wastewater treatment method and apparatus thereof6 Feb 2025US 2025/0042788 A1
- A water purification system and uses thereof29 Aug 2024US 2024/0286930 A1
- Method of processing liquid containing ammonia nitrogen from semiconductor fabrication machine8 Feb 2024US 2024/0043295 A1Taiwan Semiconductor Manufacturing Company.Ltd
- System and method for treating printed circuit board (pcb) wastewater27 Jul 2023US 2023/0234871 A1Greentech Environment Co., Ltd.
- Method and apparatus for removing specific contaminants from water in a recirculating or linear treatment system2 Mar 2023US 2023/0064737 A1Hhydrenesis Delta Systems LLC
Most cited
By later US patents
- Process to stabilize bioorganic, raw or treated wastewater sludge89US 5,417,861 AN-Viro International Corporation · 1995
- Method for lime stabilization of wastewater treatment plant sludges79US 4,306,978 AWillow Technology, Inc. · 1981
- Process to stabilize wastewater sludge75US 5,275,733 AN-Viro Energy Systems Ltd. · 1994
- Food, animal, vegetable and food preparation byproduct treatment apparatus and process73US 6,464,875 B1Gold Kist, Inc. · 2002
- Process for treatment of wastewater containing inorganic ammonium salts66US 5,183,577 AZimpro Passavant Environmental Systems, Inc. · 1993