B01J 49/00
Regeneration or reactivation of ion-exchangers
Official title: Regeneration or reactivation of ion-exchangers; Apparatus therefor (ion-exchange chromatography processes or apparatus B01D15/08)
B01J49/00 (Regeneration or reactivation of ion-exchangers) appears on 945 US grants and 788 published applications in this corpus.
Search patents in B01J- Granted patents
- 945
- Published applications
- 788
- Assignees
- 602
- Inventors
- 2,034
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 12 | 0 |
| 1978 | 18 | 0 |
| 1979 | 12 | 0 |
| 1980 | 25 | 0 |
| 1981 | 18 | 0 |
| 1982 | 13 | 0 |
| 1983 | 19 | 0 |
| 1984 | 20 | 0 |
| 1985 | 13 | 0 |
| 1986 | 6 | 0 |
| 1987 | 21 | 0 |
| 1988 | 9 | 0 |
| 1989 | 12 | 0 |
| 1990 | 7 | 0 |
| 1991 | 15 | 0 |
| 1992 | 17 | 0 |
| 1993 | 17 | 0 |
| 1994 | 14 | 0 |
| 1995 | 25 | 0 |
| 1996 | 7 | 0 |
| 1997 | 13 | 0 |
| 1998 | 17 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 27 | 8 |
| 2002 | 24 | 20 |
| 2003 | 12 | 19 |
| 2004 | 19 | 25 |
| 2005 | 13 | 28 |
| 2006 | 12 | 24 |
| 2007 | 13 | 26 |
| 2008 | 17 | 23 |
| 2009 | 15 | 29 |
| 2010 | 20 | 29 |
| 2011 | 15 | 27 |
| 2012 | 15 | 28 |
| 2013 | 19 | 36 |
| 2014 | 30 | 37 |
| 2015 | 23 | 37 |
| 2016 | 22 | 42 |
| 2017 | 41 | 21 |
| 2018 | 33 | 31 |
| 2019 | 25 | 48 |
| 2020 | 41 | 39 |
| 2021 | 32 | 34 |
| 2022 | 21 | 41 |
| 2023 | 24 | 31 |
| 2024 | 23 | 36 |
| 2025 | 28 | 38 |
| 2026 | 15 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01J 49/05Regeneration or reactivation of ion-exchangers: of fixed beds319
- B01J 49/50Regeneration or reactivation of ion-exchangers: characterised by the regeneration reagents310
- B01J 49/80Automatic regeneration176
- B01J 49/75Regeneration or reactivation of ion-exchangers: of water softeners153
- B01J 49/60Cleaning or rinsing ion-exchange beds143
- B01J 49/10Regeneration or reactivation of ion-exchangers: of moving beds65
- B01J 49/30Electrical regeneration53
- B01J 49/40Thermal regeneration38
All 11 subgroupsShow fewer
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
- Resin for removing phosphorus from water body, and preparation method therefor and application thereof25 Aug 2026US 12,715,791 B2Sunresin New Materials Co. Ltd.
- Water softening device28 Jul 2026US 12,691,444 B2Foshan Midea Chungho Water Purification Equipment Co., Ltd.
- Method for producing lithium-containing solution23 Jun 2026US 12,662,389 B2Sumitomo Metal Mining Co., Ltd.
- Continuous ion exchange processes for separating rare earth elements16 Jun 2026US 12,655,499 B2
- Regeneration of anion exchange resins1 Oct 2026US 2026/0295573 A1
- Prussian-blue analogue (pba) ion-chromatography-based method for selective separation of rubidium from brine3 Sep 2026US 2026/0257932 A1Technion Research & Development Foundation Limited
- Method for separating and regenerating anion exchange resin and cation exchange resin of mixed ion exchange resin20 Aug 2026US 2026/0241378 A1Kurita Water Industries Ltd.
- Method for producing lithium-containing solution13 Aug 2026US 2026/0234748 A1Sumitomo Metal Mining Co., Ltd.
- Processes for removing perfluoroalkyl substances and regenerating an adsorbent used with same30 Jul 2026US 2026/0216550 A1Uop LLC
Most cited
By later US patents
- Method and apparatus for capacitive deionization, electrochemical purification, and regeneration of electrodes157US 5,425,858 AThe Regents of the University of California · 1995
- Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions146US 4,687,561 A1987
- Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes139US 6,309,532 B1The Regents of the University of California · 2001
- Process for purifying resins utilizing bipolar interface127US 5,211,823 AMillipore Corporation · 1993
- Electrochemically assisted ion exchange123US 5,788,826 APionetics Corporation · 1998