C02F 2101/00
Nature of the contaminant
C02F2101/00 (Nature of the contaminant) appears on 9,011 US grants and 11,961 published applications in this corpus.
Search patents in C02F- Granted patents
- 9,011
- Published applications
- 11,961
- Assignees
- 5,342
- Inventors
- 24,434
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 41 | 0 |
| 1978 | 34 | 0 |
| 1979 | 31 | 0 |
| 1980 | 39 | 0 |
| 1981 | 32 | 0 |
| 1982 | 32 | 0 |
| 1983 | 31 | 0 |
| 1984 | 25 | 0 |
| 1985 | 22 | 0 |
| 1986 | 32 | 0 |
| 1987 | 39 | 0 |
| 1988 | 35 | 0 |
| 1989 | 38 | 0 |
| 1990 | 37 | 0 |
| 1991 | 59 | 0 |
| 1992 | 58 | 0 |
| 1993 | 65 | 0 |
| 1994 | 78 | 0 |
| 1995 | 62 | 0 |
| 1996 | 66 | 0 |
| 1997 | 55 | 0 |
| 1998 | 54 | 0 |
| 1999 | 82 | 0 |
| 2000 | 123 | 0 |
| 2001 | 142 | 36 |
| 2002 | 149 | 155 |
| 2003 | 143 | 226 |
| 2004 | 139 | 198 |
| 2005 | 137 | 243 |
| 2006 | 125 | 216 |
| 2007 | 153 | 240 |
| 2008 | 153 | 288 |
| 2009 | 149 | 286 |
| 2010 | 195 | 364 |
| 2011 | 191 | 364 |
| 2012 | 203 | 383 |
| 2013 | 210 | 398 |
| 2014 | 266 | 514 |
| 2015 | 262 | 650 |
| 2016 | 326 | 637 |
| 2017 | 383 | 665 |
| 2018 | 495 | 604 |
| 2019 | 524 | 641 |
| 2020 | 544 | 695 |
| 2021 | 509 | 750 |
| 2022 | 514 | 721 |
| 2023 | 462 | 722 |
| 2024 | 536 | 707 |
| 2025 | 579 | 720 |
| 2026 | 318 | 538 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Silica-based nanoparticles for PFAS remediation6 Oct 2026US 12,752,323 B2Regents of the University of Minnesota
- Waste water treatment process6 Oct 2026US 12,753,095 B2U.S. Clean Water Technology, Inc.
- Water treatment apparatus and water treatment method6 Oct 2026US 12,753,097 B2Organo Corporation
- System and method for leachate biodegradation through aquatic microorganism digestion6 Oct 2026US 12,753,098 B1
- System and method embodiments for treating produced water using supercritical water desalination coupled with supercritical water oxidation6 Oct 2026US 12,753,101 B1Triad National Security, LLC
- Removal of per- and polyfluoroalkyl substances (pfas) from water with meso- and macro-porous gels8 Oct 2026US 2026/0308019 A1The University of Akron
- Photothermal polymeric aerogels for wastewater detoxification and water recycling8 Oct 2026US 2026/0308020 A1University of Kentucky Research Foundation
- Derivatized polyamine polymers for use in metal scavenging applications8 Oct 2026US 2026/0308027 A1Bl Technologies, Inc.
- Operation method of water treatment apparatus and water treatment apparatus8 Oct 2026US 2026/0308031 A1Kubota Corporation
- 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.
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
- Method and apparatus for capacitive deionization, electrochemical purification, and regeneration of electrodes157US 5,425,858 AThe Regents of the University of California · 1995
- Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes139US 6,309,532 B1The Regents of the University of California · 2001
- Photocatalyst-binder compositions125US 5,616,532 AE. Heller & Company · 1997