C22B 3/42
By ion-exchange extraction
Official title: by ion-exchange extraction
C22B3/42 (By ion-exchange extraction) appears on 720 US grants and 678 published applications in this corpus.
Search patents in C22B- Granted patents
- 720
- Published applications
- 678
- Assignees
- 547
- Inventors
- 1,956
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 8 | 0 |
| 1978 | 10 | 0 |
| 1979 | 14 | 0 |
| 1980 | 21 | 0 |
| 1981 | 30 | 0 |
| 1982 | 19 | 0 |
| 1983 | 26 | 0 |
| 1984 | 17 | 0 |
| 1985 | 21 | 0 |
| 1986 | 21 | 0 |
| 1987 | 7 | 0 |
| 1988 | 17 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 12 | 0 |
| 1992 | 12 | 0 |
| 1993 | 17 | 0 |
| 1994 | 7 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 10 | 0 |
| 2001 | 3 | 3 |
| 2002 | 10 | 8 |
| 2003 | 6 | 12 |
| 2004 | 7 | 9 |
| 2005 | 6 | 14 |
| 2006 | 6 | 7 |
| 2007 | 8 | 12 |
| 2008 | 1 | 14 |
| 2009 | 10 | 14 |
| 2010 | 8 | 28 |
| 2011 | 9 | 24 |
| 2012 | 11 | 15 |
| 2013 | 21 | 16 |
| 2014 | 16 | 13 |
| 2015 | 15 | 22 |
| 2016 | 10 | 20 |
| 2017 | 11 | 19 |
| 2018 | 20 | 19 |
| 2019 | 21 | 26 |
| 2020 | 24 | 29 |
| 2021 | 16 | 34 |
| 2022 | 19 | 31 |
| 2023 | 22 | 73 |
| 2024 | 38 | 63 |
| 2025 | 43 | 87 |
| 2026 | 31 | 66 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integration of carbon sequestration with selective hydrometallurgical recovery of metal values22 Sep 2026US 12,742,226 B2Negative Emissions Materials, Inc.
- Solvent free copper extraction18 Aug 2026US 12,709,784 B2GreenSource Fabrication LLC
- Method for improving lithium yield in a direct lithium extraction process11 Aug 2026US 12,702,987 B2Aquatech International Corporation
- Process for recovering and purifying lithium11 Aug 2026US 12,703,896 B2Fortum Battery Recycling Oy
- Method of producing and refining carrier-free lutetium-177 using chromatography11 Aug 2026US 12,703,897 B2Korea Atomic Energy Research Institute
- Methods for carbon capture and metal recovery and related systems24 Sep 2026US 2026/0284595 A1Battelle Energy Alliance, LLC
- Lithium production24 Sep 2026US 2026/0286466 A1
- Resin for extracting lithium from lithium precipitation mother liquor, and preparation method and application thereof17 Sep 2026US 2026/0273509 A1Xi'an Lanshen New Material Technology Co., Ltd.
- Extraction of radium from phosphogypsum17 Sep 2026US 2026/0275454 A1The Florida State University Research Foundation, Inc.
- Recovery of li-salts from ores10 Sep 2026US 2026/0265071 A1Adionics
Most cited
By later US patents
- Adsorbent compositions173US 4,474,896 AUnion Carbide Corporation · 1984
- Process for the purification of lithium carbonate95US 6,048,507 ALimtech · 2000
- Recovery of lithium from brine85US 4,291,001 AThe Dow Chemical Company · 1981
- Recovery of lithium from brines71US 4,347,327 AThe Dow Chemical Company · 1982
- Process for the recovery of gold from refractory ores by pressure oxidation70US 4,552,589 AGetty Oil Company · 1985