B01J 49/57
For anionic exchangers
Official title: for anionic exchangers
B01J49/57 (For anionic exchangers) appears on 123 US grants and 186 published applications in this corpus.
Search patents in B01J- Granted patents
- 123
- Published applications
- 186
- Assignees
- 143
- Inventors
- 459
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 5 | 1 |
| 2003 | 1 | 3 |
| 2004 | 1 | 4 |
| 2005 | 3 | 7 |
| 2006 | 2 | 3 |
| 2007 | 2 | 8 |
| 2008 | 4 | 4 |
| 2009 | 6 | 7 |
| 2010 | 3 | 4 |
| 2011 | 3 | 2 |
| 2012 | 1 | 5 |
| 2013 | 2 | 3 |
| 2014 | 2 | 8 |
| 2015 | 3 | 8 |
| 2016 | 3 | 12 |
| 2017 | 7 | 6 |
| 2018 | 8 | 9 |
| 2019 | 5 | 10 |
| 2020 | 11 | 14 |
| 2021 | 11 | 9 |
| 2022 | 7 | 13 |
| 2023 | 6 | 14 |
| 2024 | 4 | 9 |
| 2025 | 10 | 14 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Water softener26 May 2026US 12,636,643 B2Panasonic Intellectual Property Management Co., Ltd.
- Process for removing cyanide from a cyanide-bearing aqueous fluid21 Apr 2026US 12,606,462 B2Commonwealth Scientific and Industrial Research Organisation
- Sustainable system and method for removing and concentrating per- and polyfluoroalkyl substances (PFAS) from water24 Feb 2026US 12,559,392 B2Emerging Compounds Treatment Technologies, Inc.
- Sodium sulfate by-product processing in lithium and battery chemical production13 Jan 2026US 12,522,510 B2Hatch Ltd.
- Oxygenated hydrocarbon production system with acidic impurity removal resin column16 Dec 2025US 12,497,372 B2SipChem Sahara International Petrochemical Company JSC
- Regeneration of anion exchange resins1 Oct 2026US 2026/0295573 A1
- 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.
- Polyimide Membranes with Tunable Functionalization for Selective Removal of Per- and Polyfluoroalkyl Substances (PFAS)23 Jul 2026US 2026/0208122 A1Polykala Technologies, LLC
- Mixed-anion sorbent for dual-functional moisture-swing direct air capture of carbon dioxide and ambient water harvesting28 May 2026US 2026/0145166 A1The Trustees of Princeton University
- Exchange resins for impurity removal30 Apr 2026US 2026/0116899 A1Entegris, Inc.
Most cited
By later US patents
- Method for recovering fluorinated alkanoic acids from waste waters62US 6,613,941 B13M Innovative Properties Company · 2003
- Process for the elution of fluorinated emulsifiers30US 6,436,244 B1Dyneon LLC · 2002
- Process for the removal and destruction of perchlorate and nitrate from aqueous streams28US 6,066,257 ACalgon Carbon Corporation · 2000
- Purification of ammonia22US 6,969,466 B1Puritan Products, Inc. · 2005
- Method of recovering phosphate for reuse as a fertilizer20US 7,588,744 B1Layne Christensen Company · 2009