C02F 2303/16
Regeneration of sorbents, filters
C02F2303/16 (Regeneration of sorbents, filters) appears on 1,712 US grants and 2,582 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,712
- Published applications
- 2,582
- Assignees
- 1,295
- Inventors
- 5,167
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 8 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 3 |
| 2002 | 23 | 24 |
| 2003 | 18 | 22 |
| 2004 | 20 | 32 |
| 2005 | 13 | 42 |
| 2006 | 19 | 38 |
| 2007 | 23 | 45 |
| 2008 | 22 | 60 |
| 2009 | 25 | 66 |
| 2010 | 42 | 99 |
| 2011 | 37 | 107 |
| 2012 | 38 | 87 |
| 2013 | 52 | 115 |
| 2014 | 72 | 120 |
| 2015 | 56 | 127 |
| 2016 | 63 | 137 |
| 2017 | 91 | 143 |
| 2018 | 107 | 147 |
| 2019 | 126 | 155 |
| 2020 | 134 | 139 |
| 2021 | 109 | 150 |
| 2022 | 104 | 158 |
| 2023 | 118 | 169 |
| 2024 | 116 | 147 |
| 2025 | 117 | 144 |
| 2026 | 77 | 106 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Composite filter and water purifier including same6 Oct 2026US 12,753,091 B2Coway Co., Ltd.
- Ion exchange membrane composition and methods for the concentration of perfluoroalkyl substances29 Sep 2026US 12,747,172 B2Evoqua Water Technologies LLC
- Electrochemical nitrogen and phosphorus removal device and method29 Sep 2026US 12,747,176 B2Beijing Drainage Group Co., Ltd
- 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.
- System and method for capturing carbon dioxide from a humidity adjusted air stream1 Sep 2026US 12,722,118 B2
- System for determining filter status8 Oct 2026US 2026/0309611 A1
- Modular multi-filter systems and methods of use1 Oct 2026US 2026/0295538 A1Pentair Water Pool and Spa, Inc.
- Fixed film bioreactor for purification of water and associated methods1 Oct 2026US 2026/0296937 A1WesTech Engineering, Inc.
- Surface functionalized foams and methods of use thereof1 Oct 2026US 2026/0297258 A1
- Adjustable weir for a collection trough, a collection trough and a collection trough assembly24 Sep 2026US 2026/0284558 A1Roberts Water Technologies, Inc.
Most cited
By later US patents
- 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
- Integrated water treatment control system with probe failure detection131US 5,895,565 ASanta Barbara Control Systems · 1999
- Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes117US 5,954,937 AThe Regents of the University of California · 1999
- Fluid treatment process and apparatus96US 4,673,507 AEco-Tec Limited · 1987