C02F 1/28
Treatment of water, waste water, or sewage: by sorption
Official title: by sorption (using ion-exchange C02F1/42; sorbent compositions B01J)
C02F1/28 (Treatment of water, waste water, or sewage: by sorption) appears on 5,819 US grants and 7,071 published applications in this corpus.
Search patents in C02F- Granted patents
- 5,819
- Published applications
- 7,071
- Assignees
- 3,555
- Inventors
- 14,798
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 39 | 0 |
| 1977 | 43 | 0 |
| 1978 | 45 | 0 |
| 1979 | 37 | 0 |
| 1980 | 47 | 0 |
| 1981 | 57 | 0 |
| 1982 | 27 | 0 |
| 1983 | 40 | 0 |
| 1984 | 28 | 0 |
| 1985 | 27 | 0 |
| 1986 | 31 | 0 |
| 1987 | 58 | 0 |
| 1988 | 56 | 0 |
| 1989 | 48 | 0 |
| 1990 | 42 | 0 |
| 1991 | 71 | 0 |
| 1992 | 62 | 0 |
| 1993 | 57 | 0 |
| 1994 | 49 | 0 |
| 1995 | 51 | 0 |
| 1996 | 50 | 0 |
| 1997 | 58 | 0 |
| 1998 | 56 | 0 |
| 1999 | 88 | 0 |
| 2000 | 100 | 0 |
| 2001 | 90 | 21 |
| 2002 | 115 | 144 |
| 2003 | 103 | 172 |
| 2004 | 109 | 168 |
| 2005 | 100 | 195 |
| 2006 | 83 | 222 |
| 2007 | 113 | 155 |
| 2008 | 117 | 222 |
| 2009 | 95 | 201 |
| 2010 | 135 | 241 |
| 2011 | 116 | 264 |
| 2012 | 140 | 254 |
| 2013 | 142 | 230 |
| 2014 | 161 | 321 |
| 2015 | 164 | 315 |
| 2016 | 164 | 325 |
| 2017 | 208 | 348 |
| 2018 | 249 | 374 |
| 2019 | 279 | 403 |
| 2020 | 319 | 380 |
| 2021 | 281 | 390 |
| 2022 | 257 | 337 |
| 2023 | 257 | 382 |
| 2024 | 297 | 377 |
| 2025 | 307 | 349 |
| 2026 | 151 | 281 |
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
- Silicon-aluminum-iron composite material, and preparation method therefor and use thereof29 Sep 2026US 12,746,526 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Composite metal oxide29 Sep 2026US 12,747,166 B2SETOLAS Holdings, Inc.
- Water purification system29 Sep 2026US 12,747,167 B2Fermi Forward Discovery Group, LLC
- Method for treating wastewater15 Sep 2026US 12,735,337 B2Mitsubishi Chemical Corporation
- 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
- Method for Treating Phosphorus-Containing Wastewater Produced During Preparation of Sulfonamide Compound8 Oct 2026US 2026/0308035 A1Nanhai Beisha Pharmaceutical Co., Ltd.
- Complexated biomolecules for use in contaminated soil or groundwater cleanup8 Oct 2026US 2026/0308334 A1BlueHalo, LLC
- Additive combination for treatment of heavy metals and dioxins in fly ash1 Oct 2026US 2026/0295645 A1Zhejiang University
Most cited
By later US patents
- Inductively powered lamp assembly370US 6,731,071 B2Access Business Group International LLC · 2004
- Inductively powered lamp assembly317US 6,917,163 B2Access Business Group International LLC · 2005
- Inductively powered lamp assembly315US 6,812,645 B2Access Business Group International LLC · 2004
- Starter assembly for a gas discharge lamp282US 6,806,649 B2Access Business Group International LLC · 2004
- Method of manufacturing a lamp assembly279US 6,831,417 B2Access Business Group International LLC · 2004