C02F 1/66
Treatment of water, waste water, or sewage: by neutralisation
Official title: by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58)
C02F1/66 (Treatment of water, waste water, or sewage: by neutralisation) appears on 2,594 US grants and 3,379 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,594
- Published applications
- 3,379
- Assignees
- 1,945
- Inventors
- 7,202
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 15 | 0 |
| 1978 | 18 | 0 |
| 1979 | 8 | 0 |
| 1980 | 11 | 0 |
| 1981 | 7 | 0 |
| 1982 | 11 | 0 |
| 1983 | 8 | 0 |
| 1984 | 11 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 13 | 0 |
| 1988 | 19 | 0 |
| 1989 | 21 | 0 |
| 1990 | 11 | 0 |
| 1991 | 22 | 0 |
| 1992 | 21 | 0 |
| 1993 | 17 | 0 |
| 1994 | 22 | 0 |
| 1995 | 23 | 0 |
| 1996 | 27 | 0 |
| 1997 | 24 | 0 |
| 1998 | 29 | 0 |
| 1999 | 37 | 0 |
| 2000 | 32 | 0 |
| 2001 | 46 | 8 |
| 2002 | 35 | 61 |
| 2003 | 43 | 81 |
| 2004 | 50 | 81 |
| 2005 | 48 | 99 |
| 2006 | 66 | 93 |
| 2007 | 61 | 96 |
| 2008 | 61 | 107 |
| 2009 | 62 | 101 |
| 2010 | 71 | 122 |
| 2011 | 61 | 110 |
| 2012 | 60 | 124 |
| 2013 | 64 | 125 |
| 2014 | 65 | 151 |
| 2015 | 75 | 139 |
| 2016 | 99 | 146 |
| 2017 | 86 | 165 |
| 2018 | 119 | 129 |
| 2019 | 121 | 161 |
| 2020 | 138 | 160 |
| 2021 | 125 | 176 |
| 2022 | 127 | 191 |
| 2023 | 113 | 192 |
| 2024 | 133 | 216 |
| 2025 | 145 | 185 |
| 2026 | 83 | 160 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method for high-value application of PTA residue high-concentration bromine-containing wastewater to preparation of cuprous bromide22 Sep 2026US 12,741,881 B2Jiangsu University of Technology
- Systems and methods for desalination of liquids22 Sep 2026US 12,741,888 B2Acquolina Il Mondo, LLC
- Method and kit for remediation of environments contaminated with halogenated organic compounds15 Sep 2026US 12,734,568 B2Photon Remediation Technology N.V.
- Oil-water mixture treatment device and method15 Sep 2026US 12,735,334 B2China Petroleum & Chemical Corporation
- Additive combination for treatment of heavy metals and dioxins in fly ash1 Oct 2026US 2026/0295645 A1Zhejiang University
- Method for metal ion removal from metal-containing solution using fluidized bed homogeneous crystallization24 Sep 2026US 2026/0285717 A1National Chunghsing University
- Method and System for Fine Particulate Removal and Processing from a Coal Combustion Residual Surface Impoundment24 Sep 2026US 2026/0285729 A1United Conveyor Corporation
- Process for treatment of mine contact water17 Sep 2026US 2026/0274726 A2Teck Resources Limited
- Closed-loop water system with integrated atmospheric water generation and greywater recycling17 Sep 2026US 2026/0274729 A1
Most cited
By later US patents
- Recarbonation of spent oil shale281US 4,016,239 AUnion Oil Company of California · 1977
- System and method for detecting time-bomb malware168US 9,536,091 B2FireEye, Inc. · 2017
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- Water treatment method for heavy oil production150US 6,733,636 B1Ionics, Incorporated · 2004
- Continuous process for the reclamation of waste drilling fluids141US 4,482,459 ANewpark Waste Treatment Systems Inc. · 1984