B01J 41/00
Anion exchange
Official title: Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties (ion-exchange chromatography processes B01D15/36)
B01J41/00 (Anion exchange) appears on 1,297 US grants and 1,460 published applications in this corpus.
Search patents in B01J- Granted patents
- 1,297
- Published applications
- 1,460
- Assignees
- 833
- Inventors
- 3,445
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 7 | 0 |
| 1978 | 17 | 0 |
| 1979 | 12 | 0 |
| 1980 | 22 | 0 |
| 1981 | 16 | 0 |
| 1982 | 16 | 0 |
| 1983 | 18 | 0 |
| 1984 | 11 | 0 |
| 1985 | 13 | 0 |
| 1986 | 11 | 0 |
| 1987 | 7 | 0 |
| 1988 | 14 | 0 |
| 1989 | 11 | 0 |
| 1990 | 14 | 0 |
| 1991 | 12 | 0 |
| 1992 | 21 | 0 |
| 1993 | 19 | 0 |
| 1994 | 17 | 0 |
| 1995 | 14 | 0 |
| 1996 | 7 | 0 |
| 1997 | 17 | 0 |
| 1998 | 15 | 0 |
| 1999 | 16 | 0 |
| 2000 | 14 | 0 |
| 2001 | 13 | 5 |
| 2002 | 21 | 25 |
| 2003 | 20 | 35 |
| 2004 | 16 | 35 |
| 2005 | 25 | 47 |
| 2006 | 20 | 43 |
| 2007 | 26 | 33 |
| 2008 | 19 | 34 |
| 2009 | 13 | 40 |
| 2010 | 25 | 46 |
| 2011 | 24 | 56 |
| 2012 | 33 | 44 |
| 2013 | 28 | 43 |
| 2014 | 26 | 65 |
| 2015 | 45 | 67 |
| 2016 | 53 | 81 |
| 2017 | 58 | 86 |
| 2018 | 64 | 70 |
| 2019 | 52 | 78 |
| 2020 | 68 | 92 |
| 2021 | 62 | 83 |
| 2022 | 45 | 70 |
| 2023 | 54 | 60 |
| 2024 | 52 | 78 |
| 2025 | 55 | 78 |
| 2026 | 27 | 66 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device and method for passive collection of atmospheric carbon dioxide with a double-walled harvest chamber29 Sep 2026US 12,746,508 B2Arizona Board of Regents on behalf of Arizona State University
- Formulations and processes for treating water from impacted sources25 Aug 2026US 12,714,991 B2Brown University
- Structured organic films containing imidazolium having cationic charge functionality and methods thereof21 Jul 2026US 12,686,743 B2Genesee Valley Innovations, LLC
- Methods of PFAS destruction using UV irradiation at 222 nanometers16 Jun 2026US 12,655,051 B2Claros Technologies Inc.
- Physically reinforced structured organic film (SOF) anion exchange membranes (AEMs)12 May 2026US 12,623,212 B2Xerox Corporation
- Regeneration of anion exchange resins1 Oct 2026US 2026/0295573 A1
- Single-ion electrolytes for solid-state alkaline batteries24 Sep 2026US 2026/0291007 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Methods of PFAS Destruction using UV Irradiation at 222 Nanometers17 Sep 2026US 2026/0274731 A1Claros Technologies Inc.
- Coated sorbent materials for the removal of ammonium and associated method of use10 Sep 2026US 2026/0263509 A1HemoCleanse Technologies LLC
- Porous organic materials for iodine remediation in water10 Sep 2026US 2026/0265085 A1
Most cited
By later US patents
- Affinity matrices of modified polysaccharide supports427US 5,059,654 ACuno Incorporated · 1991
- Method and composition for removing uremic toxins in dialysis processes191US 7,241,272 B2Baxter International Inc. · 2007
- Method and composition for removing uremic toxins in dialysis processes142US 8,002,726 B2Baxter International Inc. · 2011
- Modified factor VIII132US 4,970,300 ANew York University · 1990
- Polymerization processes and products therefrom125US 4,224,415 ARohm and Haas Company · 1980