C02F 1/70
Treatment of water, waste water, or sewage: by reduction
Official title: by reduction {(C02F1/4676 takes precedence)}
C02F1/70 (Treatment of water, waste water, or sewage: by reduction) appears on 848 US grants and 908 published applications in this corpus.
Search patents in C02F- Granted patents
- 848
- Published applications
- 908
- Assignees
- 683
- Inventors
- 2,339
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 1 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 13 | 0 |
| 1992 | 21 | 0 |
| 1993 | 23 | 0 |
| 1994 | 24 | 0 |
| 1995 | 18 | 0 |
| 1996 | 21 | 0 |
| 1997 | 17 | 0 |
| 1998 | 16 | 0 |
| 1999 | 22 | 0 |
| 2000 | 16 | 0 |
| 2001 | 27 | 7 |
| 2002 | 12 | 19 |
| 2003 | 18 | 19 |
| 2004 | 16 | 20 |
| 2005 | 8 | 24 |
| 2006 | 8 | 33 |
| 2007 | 17 | 34 |
| 2008 | 13 | 31 |
| 2009 | 14 | 35 |
| 2010 | 21 | 36 |
| 2011 | 21 | 40 |
| 2012 | 19 | 42 |
| 2013 | 17 | 50 |
| 2014 | 28 | 36 |
| 2015 | 26 | 48 |
| 2016 | 29 | 37 |
| 2017 | 25 | 47 |
| 2018 | 26 | 35 |
| 2019 | 33 | 33 |
| 2020 | 36 | 52 |
| 2021 | 35 | 43 |
| 2022 | 30 | 48 |
| 2023 | 28 | 34 |
| 2024 | 29 | 37 |
| 2025 | 29 | 36 |
| 2026 | 21 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and kit for remediation of environments contaminated with halogenated organic compounds15 Sep 2026US 12,734,568 B2Photon Remediation Technology N.V.
- Water treatment method and water treatment agent composition8 Sep 2026US 12,728,390 B2Organo Corporation
- Functional aqueous solution supply apparatus28 Jul 2026US 12,692,179 B2Kurita Water Industries Ltd.
- 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
- Methods of PFAS destruction using UV irradiation at 222 nanometers16 Jun 2026US 12,655,051 B2Claros Technologies Inc.
- Method and system for treatment of pfas contaminated wastewater and water utilizing gas nanobubbles24 Sep 2026US 2026/0285708 A1Streamgo Water Solutions Inc.
- Water treatment apparatus for decomposing perfluorinated compound on basis of vacuum ultraviolet rays24 Sep 2026US 2026/0285710 A1Seoul National University R&Db Foundation
- Water treatment device and water treatment method24 Sep 2026US 2026/0285718 A1Organo Corporation
- Methods of PFAS Destruction using UV Irradiation at 222 Nanometers17 Sep 2026US 2026/0274731 A1Claros Technologies Inc.
- Method of carbon capture and recycling tetramethyl ammonium carbonate-containing solution27 Aug 2026US 2026/0250164 A1United Microelectronics Corp.
Most cited
By later US patents
- Self-contained water treatment system152US 5,269,919 A1993
- Integrated water treatment control system with probe failure detection131US 5,895,565 ASanta Barbara Control Systems · 1999
- Method of treating fluids93US 4,642,192 A1987
- Waste water treating process85US 5,098,567 ANishihara Environmental Sanitation Research Corporation Limited · 1992
- Process for the treatment of metal-containing water and recovery of metals therefrom81US 5,505,857 ABoard of Regents of the University and Community College System of Nevada on behalf of the University of Nevada · 1996