B01D 2321/223
Polarity reversal
B01D2321/223 (Polarity reversal) appears on 24 US grants and 36 published applications in this corpus.
Search patents in B01D- Granted patents
- 24
- Published applications
- 36
- Assignees
- 29
- Inventors
- 103
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 2 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 3 |
| 2015 | 0 | 3 |
| 2016 | 4 | 3 |
| 2017 | 1 | 2 |
| 2018 | 0 | 4 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 3 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Forward osmosis filtration cell, and methods of filtering water with a forward osmosis filtration cell7 Apr 2026US 12,594,526 B2University of Vermont and State Agricultural College
- Simplified architecture for desalination via electrodialysis26 Aug 2025US 12,397,263 B2Massachusetts Institute of Technology
- Method and device for asymmetric polarity inversion in electromembrane processes6 Jun 2023US 11,666,863 B2Investigaciones Forestales Bioforest S.A.
- Electrochemical ion exchange treatment of fluids11 May 2021US 11,001,511 B2Erix Solutions Corporation
- Water treatment device27 Oct 2020US 10,815,134 B2Panasonic Intellectual Property Management Co., Ltd.
- Electrodialysis process with active foulant removal sequence12 Feb 2026US 2026/0042065 A1Evoqua Water Technologies LLC
- Chemical free extraction of lithium from brine17 Jul 2025US 2025/0230074 A1The George Washington University
- Device for electrodialysis and a method for electrodialysis26 Jun 2025US 2025/0205648 A1Stichting IMEC Nederland
- Simplified Architecture for Desalination via Electrodialysis3 Aug 2023US 2023/0241554 A1Massachusetts Institute of Technology
- Forward osmosis filtration cell, and methods of filtering water with a forward osmosis filtration cell27 Jul 2023US 2023/0233994 A1University of Vermont and State Agricultural College
Most cited
By later US patents
- Reversible electrolytic system for softening and dealkalizing water93US 4,671,863 A1987
- Electrodialysis apparatus and process59US 4,608,140 AIonics, Incorporated · 1986
- Method and apparatus for improving the life of an electrode52US 4,707,240 AIonics, Incorporated · 1987
- Electrodialysis apparatus and process for fractionating protein mixtures28US 4,276,140 AIonics, Incorporated · 1981
- Reverse osmosis electrodialysis combined means23US 4,284,492 A1981