B01D 2325/42
Ion-exchange membranes
B01D2325/42 (Ion-exchange membranes) appears on 332 US grants and 561 published applications in this corpus.
Search patents in B01D- Granted patents
- 332
- Published applications
- 561
- Assignees
- 294
- Inventors
- 1,194
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 3 |
| 2004 | 2 | 7 |
| 2005 | 0 | 6 |
| 2006 | 2 | 4 |
| 2007 | 2 | 4 |
| 2008 | 3 | 3 |
| 2009 | 1 | 6 |
| 2010 | 3 | 1 |
| 2011 | 7 | 8 |
| 2012 | 1 | 8 |
| 2013 | 7 | 17 |
| 2014 | 4 | 10 |
| 2015 | 13 | 24 |
| 2016 | 11 | 29 |
| 2017 | 20 | 32 |
| 2018 | 20 | 31 |
| 2019 | 20 | 33 |
| 2020 | 22 | 45 |
| 2021 | 29 | 41 |
| 2022 | 20 | 41 |
| 2023 | 30 | 47 |
| 2024 | 44 | 66 |
| 2025 | 32 | 60 |
| 2026 | 27 | 34 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hybrid system and method of waste heat utilization-based photovoltaic power generation and seawater desalination6 Oct 2026US 12,752,240 B2Xi' An Jiaotong University
- Point of use or point of dispense filter with multiple pleat packs15 Sep 2026US 12,734,488 B2Entegris, Inc.
- Concentration apparatus and concentration method1 Sep 2026US 12,722,120 B2Yokogawa Electric Corporation
- Cation exchange membrane and method for producing same1 Sep 2026US 12,722,125 B2Astom Corporation
- Preparation of metallocene containing cationic polymers for anion exchange applications28 Jul 2026US 12,691,419 B2University of South Carolina
- Cationic Compounds for Anion Exchange Membranes3 Sep 2026US 2026/0257990 A1Agfa-Gevaert
- Lithium recovery from wastewater27 Aug 2026US 2026/0250143 A1
- Separator for a battery, battery and method for producing a separator27 Aug 2026US 2026/0254048 A1INL - International Iberian Nanotechnology Laboratory
- Ceramic cation exchange materials13 Aug 2026US 2026/0233171 A1Membrion, Inc.
- Chemically enhanced electrodialysis (ceed): a universal platform for selective ion removal30 Jul 2026US 2026/0216660 A1Texas Tech University System
Most cited
By later US patents
- Microporous membranes and uses thereof103US 6,258,276 B1McMaster University · 2001
- Combined membrane and sorption process for selective ion removal79US 4,806,244 AThe Dow Chemical Company · 1989
- Microporous materials77US 5,238,613 A1993
- Asymmetric gel-filled microporous membranes52US 7,247,370 B2McMaster University · 2007
- Poly(phenylene)-based anion exchange membrane45US 7,888,397 B1Sandia Corporation · 2011