B01D 2325/14
Membrane materials having negatively charged functional groups
B01D2325/14 (Membrane materials having negatively charged functional groups) appears on 239 US grants and 363 published applications in this corpus.
Search patents in B01D- Granted patents
- 239
- Published applications
- 363
- Assignees
- 228
- Inventors
- 895
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 4 |
| 2004 | 4 | 6 |
| 2005 | 3 | 3 |
| 2006 | 2 | 5 |
| 2007 | 3 | 11 |
| 2008 | 3 | 8 |
| 2009 | 2 | 12 |
| 2010 | 1 | 18 |
| 2011 | 5 | 13 |
| 2012 | 11 | 5 |
| 2013 | 12 | 20 |
| 2014 | 10 | 12 |
| 2015 | 8 | 16 |
| 2016 | 16 | 17 |
| 2017 | 11 | 18 |
| 2018 | 12 | 22 |
| 2019 | 14 | 17 |
| 2020 | 18 | 26 |
| 2021 | 13 | 21 |
| 2022 | 16 | 25 |
| 2023 | 15 | 19 |
| 2024 | 11 | 20 |
| 2025 | 14 | 32 |
| 2026 | 9 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concentration apparatus and concentration method1 Sep 2026US 12,722,120 B2Yokogawa Electric Corporation
- Diffusion transfer functionalized membrane28 Jul 2026US 12,691,420 B2Wisconsin Alumni Research Foundation
- System and method for dual-pathway system for carbon dioxide capture from ocean water30 Jun 2026US 12,668,518 B2California Institute of Technology
- Sulfonated polymers and compositions thereof26 May 2026US 12,637,532 B2Kraton Corporation
- Process for manufacturing wet strength resins21 Apr 2026US 12,606,673 B2Kemira Oyj
- 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.
- Methods for making charged ultrafiltration membranes and uses thereof in dairy applications30 Jul 2026US 2026/0216653 A1fairlife, LLC
- Chemically enhanced electrodialysis (ceed): a universal platform for selective ion removal30 Jul 2026US 2026/0216660 A1Texas Tech University System
- Preparation method of nh2-uio-66 encapsulated sulfamic acid and use thereof23 Jul 2026US 2026/0208119 A1China Three Gorges University
Most cited
By later US patents
- Filtration membranes, and related nano and/or micro fibers, composites, methods and systems254US 10,532,330 B2California Institute of Technology · 2020
- Preparation of crosslinked matrices containing covalently immobilized chemical species and unbound releasable chemical species253US 5,563,056 ABSI Corporation · 1996
- Composite materials comprising supported porous gels116US 7,316,919 B2Nysa Membrane Technologies · 2008
- Microporous membranes and uses thereof103US 6,258,276 B1McMaster University · 2001
- Fuel cell and electrolyte membrane therefor94US 5,409,785 AKabushikikaisha Equos Research · 1995