B01D 15/364
Amphoteric or zwitterionic ion-exchanger
Official title: {Amphoteric or zwitterionic ion-exchanger}
B01D15/364 (Amphoteric or zwitterionic ion-exchanger) appears on 23 US grants and 34 published applications in this corpus.
Search patents in B01D- Granted patents
- 23
- Published applications
- 34
- Assignees
- 26
- Inventors
- 99
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 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 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 3 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 4 |
| 2011 | 1 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 2 | 5 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 3 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Separation of nucleic acid component compounds on zwitterionic stationary phases24 Mar 2026US 12,584,159 B2Waters Technologies Corporation
- Sulfonamide based anion exchange resins29 Apr 2025US 12,285,704 B2Dionex Corporation
- Process for separation and purification of a dicarboxylic acid containing mixture27 Sep 2022US 11,453,636 B2Archer Daniels Midland Company
- Process for making esters of 2,5-furandicarboxylic acid3 Aug 2021US 11,078,174 B2Archer Daniels Midland Company
- Process for making acrylic acid from dextrose4 Jun 2019US 10,308,582 B2Archer Daniels Midland Company
- Method for selective separation of amphoteric species30 Jul 2026US 2026/0216621 A1i3 Membrane GmbH
- Process for separation and quantification of non-ionic surfactant24 Oct 2024US 2024/0352061 A1Kashiv Biosciences, LLC
- Method for the separation of anionic, cationic, neutral and zwitterionic arsenic species20 Jun 2024US 2024/0198255 A1Dionex Corporation
- Hybrid thermal - chromatographic system for simultaneous mineral purification and desalination of saline waters20 Jul 2023US 2023/0226462 A1Alliance for Sustainable Energy, LLC
- Separation of nucleic acid component compounds on zwitterionic stationary phases8 Dec 2022US 2022/0389480 A1Waters Technologies Corporation
Most cited
By later US patents
- Composite materials comprising deformable xerogel within the pores of particulate rigid supports useful in chromatography57US 4,335,017 AUnited Kingdom Atomic Energy Authority · 1982
- Composite materials comprising deformable xerogel within the pores of particulate rigid supports useful in chromatography26US 4,336,161 AUnited Kingdom Atomic Energy Authority · 1982
- Column packing material20US 7,238,426 B2Sequant AB · 2007
- Chromatography method and a column material useful in said method15US 6,884,345 B12005
- Ionically modified cellulose material, its preparation and its use10US 4,577,013 ACiba-Geigy Corporation · 1986