C02F 2101/38
Containing nitrogen
Official title: containing nitrogen
C02F2101/38 (Containing nitrogen) appears on 427 US grants and 570 published applications in this corpus.
Search patents in C02F- Granted patents
- 427
- Published applications
- 570
- Assignees
- 410
- Inventors
- 1,655
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 3 |
| 2002 | 11 | 3 |
| 2003 | 9 | 16 |
| 2004 | 12 | 11 |
| 2005 | 3 | 14 |
| 2006 | 4 | 7 |
| 2007 | 7 | 9 |
| 2008 | 8 | 5 |
| 2009 | 6 | 10 |
| 2010 | 7 | 12 |
| 2011 | 5 | 14 |
| 2012 | 5 | 19 |
| 2013 | 7 | 6 |
| 2014 | 13 | 14 |
| 2015 | 17 | 26 |
| 2016 | 12 | 23 |
| 2017 | 15 | 21 |
| 2018 | 23 | 37 |
| 2019 | 17 | 33 |
| 2020 | 23 | 43 |
| 2021 | 31 | 34 |
| 2022 | 28 | 47 |
| 2023 | 32 | 52 |
| 2024 | 31 | 43 |
| 2025 | 36 | 42 |
| 2026 | 23 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Precious metal loaded covalent organic framework composite material and preparation method therefor23 Jun 2026US 12,661,641 B2Guangdong Institute of Eco-Environment and Soil Sciences
- MOFS/COFS heterojunction composite photocatalyst and preparation method and application thereof23 Jun 2026US 12,661,642 B2Guangdong Institute of Eco-Environment and Soil Sciences
- Methods and compositions to reduce azoles and AOX corrosion inhibitors9 Jun 2026US 12,649,675 B2Bl Technologies, Inc.
- Water treatment system, pure water production method, and water treatment method1 Oct 2026US 2026/0296933 A1Organo Corporation
- Water treatment apparatus and water treatment method24 Sep 2026US 2026/0285720 A1Organo Corporation
- Method for reducing risks of composite pollutants in sewage3 Sep 2026US 2026/0257942 A1Nanjing University
- Advanced oxidation system in treatment of contaminants in water and method for treatment of contaminants in water27 Aug 2026US 2026/0250167 A1Beijing Normal University At Zhuhai
- Composite material for remedying soils with contamination of heavy metals and method therefor20 Aug 2026US 2026/0241363 A1Beijing University of Chemical Technology
Most cited
By later US patents
- Process for treatment of wastewater containing inorganic ammonium salts66US 5,183,577 AZimpro Passavant Environmental Systems, Inc. · 1993
- Process for the removal of contaminants from water51US 7,306,735 B2General Electric Company · 2007
- Method for removing chloramine with catalytic carbon41US 5,338,458 ACalgon Carbon Corporation · 1994
- Wet oxidation process for ACN waste streams35US 5,192,453 AThe Standard Oil Company · 1993
- Apparatus and method for wastewater treatment with enhanced solids reduction (ESR)34US 6,555,002 B2Premier Wastwater International, LLC · 2003