B01J 39/00
Cation exchange
Official title: Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties (ion-exchange chromatography processes B01D15/36)
B01J39/00 (Cation exchange) appears on 1,779 US grants and 1,699 published applications in this corpus.
Search patents in B01J- Granted patents
- 1,779
- Published applications
- 1,699
- Assignees
- 1,041
- Inventors
- 4,448
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 17 | 0 |
| 1978 | 17 | 0 |
| 1979 | 19 | 0 |
| 1980 | 19 | 0 |
| 1981 | 32 | 0 |
| 1982 | 27 | 0 |
| 1983 | 29 | 0 |
| 1984 | 24 | 0 |
| 1985 | 18 | 0 |
| 1986 | 25 | 0 |
| 1987 | 27 | 0 |
| 1988 | 15 | 0 |
| 1989 | 25 | 0 |
| 1990 | 17 | 0 |
| 1991 | 27 | 0 |
| 1992 | 28 | 0 |
| 1993 | 30 | 0 |
| 1994 | 25 | 0 |
| 1995 | 28 | 0 |
| 1996 | 15 | 0 |
| 1997 | 36 | 0 |
| 1998 | 24 | 0 |
| 1999 | 30 | 0 |
| 2000 | 26 | 0 |
| 2001 | 35 | 12 |
| 2002 | 28 | 35 |
| 2003 | 32 | 34 |
| 2004 | 23 | 57 |
| 2005 | 30 | 45 |
| 2006 | 32 | 52 |
| 2007 | 32 | 30 |
| 2008 | 25 | 34 |
| 2009 | 17 | 39 |
| 2010 | 24 | 42 |
| 2011 | 24 | 49 |
| 2012 | 27 | 78 |
| 2013 | 37 | 58 |
| 2014 | 52 | 96 |
| 2015 | 48 | 102 |
| 2016 | 66 | 93 |
| 2017 | 70 | 118 |
| 2018 | 93 | 87 |
| 2019 | 88 | 100 |
| 2020 | 84 | 85 |
| 2021 | 61 | 92 |
| 2022 | 54 | 78 |
| 2023 | 66 | 71 |
| 2024 | 55 | 78 |
| 2025 | 46 | 76 |
| 2026 | 24 | 58 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dry ion exchange resin manufacturing method and manufacturing device, and treatment target liquid purifying method and purifying device15 Sep 2026US 12,734,517 B2Organo Corporation
- Cation exchange membrane and method for producing same1 Sep 2026US 12,722,125 B2Astom Corporation
- Resin for removing phosphorus from water body, and preparation method therefor and application thereof25 Aug 2026US 12,715,791 B2Sunresin New Materials Co. Ltd.
- Method for efficiently extracting and separating high-purity tetrodotoxin from pufferfish viscera18 Aug 2026US 12,709,618 B2Zhongyang Biotechnology (Shanghai) Co., LTD.
- Method for producing lithium-containing solution23 Jun 2026US 12,662,389 B2Sumitomo Metal Mining Co., Ltd.
- Novel materials and methods for refining processes17 Sep 2026US 2026/0273436 A1Lihme Protein Solutions ApS
- Separation and purification of chemicals using ion-exchange resins17 Sep 2026US 2026/0273519 A1Materials Engineering and Technical Support Services
- Coated sorbent materials for the removal of ammonium and associated method of use10 Sep 2026US 2026/0263509 A1HemoCleanse Technologies LLC
- Filler for ion exchange chromatography, method for producing same, and method for measuring hemoglobin component3 Sep 2026US 2026/0257216 A1Sekisui Medical Co., Ltd.
- Ceramic ion exchange materials with hydrophobic groups3 Sep 2026US 2026/0257217 A1Membrion, Inc.
Most cited
By later US patents
- Affinity matrices of modified polysaccharide supports427US 5,059,654 ACuno Incorporated · 1991
- Urease in insoluble form for converting urea present in a liquid221US 3,989,622 ACCI Life Systems, Inc. · 1976
- Ion exchange/chelation resins containing dense star polymers having ion exchange or chelate capabilities214US 4,871,779 AThe Dow Chemical Company · 1989
- Method and composition for removing uremic toxins in dialysis processes191US 7,241,272 B2Baxter International Inc. · 2007
- Method of synthesizing zirconium phosphate particles175US 7,566,432 B2Renal Solutions, Inc. · 2009