B01J 43/00
Amphoteric ion-exchange, i.e. using ion-exchangers having cationic and anionic groups
Official title: Amphoteric ion-exchange, i.e. using ion-exchangers having cationic and anionic groups; Use of material as amphoteric ion-exchangers; Treatment of material for improving their amphoteric ion-exchange properties (ion-exchange chromatography processes B01D15/36)
B01J43/00 (Amphoteric ion-exchange, i.e. using ion-exchangers having cationic and anionic groups) appears on 117 US grants and 118 published applications in this corpus.
Search patents in B01J- Granted patents
- 117
- Published applications
- 118
- Assignees
- 98
- Inventors
- 337
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 5 |
| 2006 | 3 | 7 |
| 2007 | 3 | 3 |
| 2008 | 1 | 0 |
| 2009 | 4 | 5 |
| 2010 | 2 | 2 |
| 2011 | 1 | 2 |
| 2012 | 1 | 3 |
| 2013 | 1 | 6 |
| 2014 | 3 | 17 |
| 2015 | 10 | 4 |
| 2016 | 7 | 3 |
| 2017 | 5 | 10 |
| 2018 | 4 | 2 |
| 2019 | 7 | 4 |
| 2020 | 2 | 10 |
| 2021 | 5 | 6 |
| 2022 | 6 | 7 |
| 2023 | 5 | 7 |
| 2024 | 2 | 4 |
| 2025 | 5 | 3 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Composite membrane6 Jan 2026US 12,515,175 B2FUJIFILM Corporation
- Metal-organic frameworks for the removal of multiple liquid phase compounds and methods for using and making same2 Dec 2025US 12,486,182 B2Electric Power Research Institute, Inc.
- Glycoform purification15 Jul 2025US 12,358,944 B2
- Polymer particles with a gradient composition and methods of production thereof24 Jun 2025US 12,338,300 B2Waters Technologies Corporation
- Membranes for enhancing rates of water dissociation and water formation25 Feb 2025US 12,233,381 B2The Regents of the University of California
- Polyimide Membranes with Tunable Functionalization for Selective Removal of Per- and Polyfluoroalkyl Substances (PFAS)23 Jul 2026US 2026/0208122 A1Polykala Technologies, LLC
- Polymer impregnated amphoteric sorbent based adsorptive desalination and disinfection systems, components, and methods23 Jul 2026US 2026/0209086 A1The University of North Carolina at Greensboro
- A sorbent granulate for separation of carbon dioxide from a fluid mixture, and a method of producing thereof25 Jun 2026US 2026/0175194 A1Vito NV
- Ammonium-Coordinated Exchanger (ACE) for Anion Contaminant Removal from Water5 Feb 2026US 2026/0035271 A1United States Department of Energy
- Metal-Organic Frameworks for the Removal of Multiple Liquid Phase Compounds and Methods for Using and Making Same18 Dec 2025US 2025/0382202 A1Electric Power Research Institute, Inc.
Most cited
By later US patents
- Electrically regenerable demineralizing apparatus59US 5,308,467 AAtomic Energy Research Institute · 1994
- Composite materials comprising deformable xerogel within the pores of particulate rigid supports useful in chromatography57US 4,335,017 AUnited Kingdom Atomic Energy Authority · 1982
- Electrically regenerable demineralizing apparatus53US 5,425,866 AEbara Corporation · 1995
- Absorptive-filtration media for the capture of waterborne or airborne constituents41US 6,468,942 B12002
- Thermally reversible, amphoteric ion exchange resins consisting of crosslinked microbeads embedded in crosslinked matrix of opposite exchange group type37US 3,957,698 AThe Dow Chemical Company · 1976