C02F 1/42
Treatment of water, waste water, or sewage: by ion-exchange
Official title: by ion-exchange (ion-exchange in general B01J)
C02F1/42 (Treatment of water, waste water, or sewage: by ion-exchange) appears on 2,530 US grants and 3,118 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,530
- Published applications
- 3,118
- Assignees
- 1,502
- Inventors
- 6,156
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 8 | 0 |
| 1978 | 9 | 0 |
| 1979 | 7 | 0 |
| 1980 | 10 | 0 |
| 1981 | 9 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 13 | 0 |
| 1985 | 11 | 0 |
| 1986 | 11 | 0 |
| 1987 | 20 | 0 |
| 1988 | 17 | 0 |
| 1989 | 25 | 0 |
| 1990 | 24 | 0 |
| 1991 | 34 | 0 |
| 1992 | 25 | 0 |
| 1993 | 28 | 0 |
| 1994 | 21 | 0 |
| 1995 | 27 | 0 |
| 1996 | 27 | 0 |
| 1997 | 36 | 0 |
| 1998 | 31 | 0 |
| 1999 | 33 | 0 |
| 2000 | 45 | 0 |
| 2001 | 60 | 14 |
| 2002 | 63 | 63 |
| 2003 | 55 | 67 |
| 2004 | 45 | 98 |
| 2005 | 42 | 97 |
| 2006 | 53 | 100 |
| 2007 | 55 | 74 |
| 2008 | 51 | 114 |
| 2009 | 42 | 92 |
| 2010 | 69 | 122 |
| 2011 | 47 | 112 |
| 2012 | 61 | 99 |
| 2013 | 70 | 118 |
| 2014 | 89 | 147 |
| 2015 | 87 | 144 |
| 2016 | 77 | 147 |
| 2017 | 92 | 135 |
| 2018 | 114 | 149 |
| 2019 | 120 | 165 |
| 2020 | 145 | 180 |
| 2021 | 124 | 133 |
| 2022 | 103 | 144 |
| 2023 | 100 | 159 |
| 2024 | 99 | 157 |
| 2025 | 104 | 169 |
| 2026 | 75 | 119 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Water treatment apparatus and water treatment method6 Oct 2026US 12,753,097 B2Organo Corporation
- Water supply system29 Sep 2026US 12,747,170 B2Disco Corporation
- Ion exchange membrane composition and methods for the concentration of perfluoroalkyl substances29 Sep 2026US 12,747,172 B2Evoqua Water Technologies LLC
- Systems and methods for ion exchange apparatus15 Sep 2026US 12,735,335 B2
- Treating produced water for beneficial reuse8 Sep 2026US 12,729,139 B2Renovo Resources LLC
- Apparatus and method for waste-water reduction in laboratory water purification system8 Oct 2026US 2026/0308022 A1Thermo Orion Inc.
- Water treatment system, pure water production method, and water treatment method1 Oct 2026US 2026/0296933 A1Organo Corporation
- Water treatment facility and water treatment method24 Sep 2026US 2026/0285712 A1Organo Corporation
- Water treatment device and water treatment method24 Sep 2026US 2026/0285718 A1Organo Corporation
- Hybrid electrodialysis and electrolysis systems and processes24 Sep 2026US 2026/0285728 A1Pani Clean, Inc.
Most cited
By later US patents
- Medicament preparation and treatment devices, methods, and systems259US 10,478,544 B2NxStage Medical, Inc. · 2019
- Filter cartridge assemblies and methods for filtering fluids217US 6,878,283 B2Renal Solutions, Inc. · 2005
- Electrodeionization apparatus202US 4,632,745 AMillipore Corporation · 1986
- Nanofiber filter media194US 6,872,311 B2Koslow Technologies Corporation · 2005
- Method and system for producing sterile aqueous solutions193US 5,032,265 AMillipore Corporation · 1991