C02F 2305/00
Use of specific compounds during water treatment
C02F2305/00 (Use of specific compounds during water treatment) appears on 2,706 US grants and 3,976 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,706
- Published applications
- 3,976
- Assignees
- 1,992
- Inventors
- 8,411
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 9 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 13 | 0 |
| 1996 | 10 | 0 |
| 1997 | 8 | 0 |
| 1998 | 19 | 0 |
| 1999 | 18 | 0 |
| 2000 | 18 | 0 |
| 2001 | 38 | 7 |
| 2002 | 26 | 48 |
| 2003 | 35 | 56 |
| 2004 | 32 | 63 |
| 2005 | 25 | 84 |
| 2006 | 42 | 71 |
| 2007 | 47 | 89 |
| 2008 | 42 | 86 |
| 2009 | 52 | 98 |
| 2010 | 63 | 127 |
| 2011 | 56 | 132 |
| 2012 | 54 | 125 |
| 2013 | 84 | 156 |
| 2014 | 91 | 185 |
| 2015 | 99 | 223 |
| 2016 | 111 | 194 |
| 2017 | 143 | 212 |
| 2018 | 159 | 180 |
| 2019 | 166 | 231 |
| 2020 | 191 | 235 |
| 2021 | 188 | 284 |
| 2022 | 143 | 224 |
| 2023 | 194 | 268 |
| 2024 | 176 | 220 |
| 2025 | 211 | 215 |
| 2026 | 109 | 163 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C02F 2305/02Specific form of oxidantIndexing code693
- C02F 2305/08Nanoparticles or nanotubesIndexing code657
- C02F 2305/10PhotocatalystsIndexing code640
- C02F 2305/06Nutrients for stimulating the growth of microorganismsIndexing code386
- C02F 2305/04Surfactants, used as part of a formulation or aloneIndexing code297
- C02F 2305/12Inert solids used as ballast for improving sedimentationIndexing code130
- C02F 2305/14Additives which dissolves or releases substances when predefined environmental conditions are reachedIndexing code82
Recent patents
- Silica-based nanoparticles for PFAS remediation6 Oct 2026US 12,752,323 B2Regents of the University of Minnesota
- Catalytic oxidation reactor and complete set of equipment22 Sep 2026US 12,741,893 B2Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.
- Method for treating wastewater15 Sep 2026US 12,735,337 B2Mitsubishi Chemical Corporation
- 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.
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Method for Complete Sulfate and Metal Removal from Produced Water Using a Three-Step Treatment Process for Reinjection8 Oct 2026US 2026/0308034 A1Molecular Filtration, Inc.
- Complexated biomolecules for use in contaminated soil or groundwater cleanup8 Oct 2026US 2026/0308334 A1BlueHalo, LLC
- Strain of paenibacillus glycanilyticus and application thereof in nitrogen removal treatment of nitrogen-containing aquaculture wastewater8 Oct 2026US 2026/0308511 A1Zhejiang Marine Fisheries Research Institute
- Methods and systems for continuous pfas destruction1 Oct 2026US 2026/0296928 A1Claros Technologies Inc.
- Method for degradation of pfas based on sonocatalysis1 Oct 2026US 2026/0296932 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Electrochemical production of ozone and hydrogen peroxide465US 5,972,196 ALynntech, Inc. · 1999
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Gas-solid photocatalytic oxidation of environmental pollutants131US 5,045,288 AArizona Board of Regents, a body corporate acting on behalf of Arizona State University · 1991
- Titanium dioxide photo-catalyzer130US 5,919,422 AToyoda Gosei Co., Ltd. · 1999
- Catalytic process for degradation of organic materials in aqueous and organic fluids to produce environmentally compatible products125US 4,861,484 ASynlize, Inc. · 1989