C02F 1/4691
Capacitive deionisation
Official title: {Capacitive deionisation}
C02F1/4691 (Capacitive deionisation) appears on 401 US grants and 574 published applications in this corpus.
Search patents in C02F- Granted patents
- 401
- Published applications
- 574
- Assignees
- 240
- Inventors
- 1,033
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 8 |
| 2003 | 7 | 7 |
| 2004 | 12 | 10 |
| 2005 | 0 | 9 |
| 2006 | 3 | 2 |
| 2007 | 2 | 5 |
| 2008 | 3 | 19 |
| 2009 | 2 | 18 |
| 2010 | 5 | 19 |
| 2011 | 4 | 20 |
| 2012 | 6 | 21 |
| 2013 | 11 | 31 |
| 2014 | 17 | 33 |
| 2015 | 20 | 46 |
| 2016 | 20 | 44 |
| 2017 | 29 | 25 |
| 2018 | 23 | 24 |
| 2019 | 31 | 29 |
| 2020 | 26 | 31 |
| 2021 | 19 | 39 |
| 2022 | 16 | 35 |
| 2023 | 18 | 34 |
| 2024 | 22 | 19 |
| 2025 | 31 | 21 |
| 2026 | 15 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Soft-water system25 Aug 2026US 12,715,795 B2Kyungdong Navien Co., Ltd.
- Flow-electrode cartridge unit and submerged flow-electrode capacitive deionization device using same4 Aug 2026US 12,697,588 B2Korea University Research and Business Foundation
- Water softening system21 Jul 2026US 12,686,624 B2Kyungdong Navien Co., Ltd.
- System and method for using ultramicroporous carbon for the selective removal of nitrate with capacitive deionization30 Jun 2026US 12,668,516 B2Lawrence Livermore National Security, LLC
- High recovery electrodialysis method16 Jun 2026US 12,655,046 B2Evoqua Water Technologies LLC
- Fresh Water Production at the Point of Need Using an Integrated System of Capacitive Deionization and Electrochemical Disinfection10 Sep 2026US 2026/0265090 A1Global Graphene Group, Inc.
- Capacitive-faradaic and pseudocapacitive-faradaic fuel cells20 Aug 2026US 2026/0242256 A1Technion Research & Development Foundation Limited
- Method for desalinating liquid20 Aug 2026US 2026/0242257 A1Ming Chi University of Technology
- Water treatment apparatus and control method of water treatment apparatus20 Aug 2026US 2026/0242258 A1Samsung Electronics Co., Ltd.
- Control method for pure water production system23 Jul 2026US 2026/0209077 A1Kurita Water Industries Ltd.
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
- Method of making composite electrode and current collectors120US 6,830,595 B2Advanced Energy Technology Inc. · 2004
- Electrode array for use in electrochemical cells118US 7,368,191 B2Biosource, Inc. · 2008
- Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes117US 5,954,937 AThe Regents of the University of California · 1999