C02F 1/26
Treatment of water, waste water, or sewage: by extraction
Official title: by extraction
C02F1/26 (Treatment of water, waste water, or sewage: by extraction) appears on 555 US grants and 547 published applications in this corpus.
Search patents in C02F- Granted patents
- 555
- Published applications
- 547
- Assignees
- 435
- Inventors
- 1,549
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 9 | 0 |
| 1978 | 2 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 16 | 0 |
| 1990 | 8 | 0 |
| 1991 | 6 | 0 |
| 1992 | 12 | 0 |
| 1993 | 12 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 1 |
| 2002 | 7 | 9 |
| 2003 | 11 | 11 |
| 2004 | 10 | 10 |
| 2005 | 12 | 20 |
| 2006 | 10 | 11 |
| 2007 | 7 | 12 |
| 2008 | 7 | 11 |
| 2009 | 12 | 14 |
| 2010 | 11 | 13 |
| 2011 | 4 | 10 |
| 2012 | 5 | 17 |
| 2013 | 9 | 11 |
| 2014 | 8 | 30 |
| 2015 | 10 | 19 |
| 2016 | 17 | 12 |
| 2017 | 17 | 23 |
| 2018 | 17 | 22 |
| 2019 | 25 | 27 |
| 2020 | 20 | 36 |
| 2021 | 26 | 37 |
| 2022 | 17 | 24 |
| 2023 | 20 | 49 |
| 2024 | 31 | 53 |
| 2025 | 31 | 39 |
| 2026 | 30 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for water processing29 Sep 2026US 12,746,520 B2
- Systems and methods for desalination of liquids22 Sep 2026US 12,741,888 B2Acquolina Il Mondo, LLC
- Osmotic methods and systems involving energy recovery1 Sep 2026US 12,722,989 B2Gradiant Corporation
- Wave-actuated system, wave energy converter subsystem, and method for operating a reverse-osmosis desalination subsystem14 Jul 2026US 12,678,738 B2Oneka Technologies
- Device and system for water desalinization30 Jun 2026US 12,668,510 B2
- Device and system for water desalinization1 Oct 2026US 2026/0296926 A1
- Process for producing battery-grade lithium carbonate from wastewater solution containing lithium and sodium recovered from ternary battery24 Sep 2026US 2026/0285699 A1Hebei Leheng Energy Saving Equipment Co., Ltd.
- Materials and methods for iodine capture24 Sep 2026US 2026/0290827 A1University of Houston System
- System for resource recovery and zero liquid discharge treatment of wastewater generated during a precursor manufacturing process for a cathode active material of secondary battery10 Sep 2026US 2026/0265105 A1Bkt Co., Ltd.
- Removal and destruction of perfluoroalkyl and polyfluoroalkyl substances from contaminated water20 Aug 2026US 2026/0242247 A1Evoqua Water Technologies LLC
Most cited
By later US patents
- Recovery of carboxylic acids from chemical plant effluents85US 5,635,071 AZenon Airport Enviromental, Inc. · 1997
- Method for the extraction of water from macromolecular solutions82US 4,828,710 AMitsui Toatsu Chemicals, Inc. · 1989
- Hydrogel containing envelopes71US 5,147,646 ANational Research Development Corporation · 1992
- Process for removing monohydric and polyhydric phenols from waste water67US 4,025,423 AMetallgesellschaft Aktiengesellschaft · 1977
- Process for treatment of organic contaminants in solid or liquid phase wastes57US 4,793,931 ASolarchem Research, Division of Brolor Investments, Ltd. · 1988