C22B 3/26
By liquid-liquid extraction using organic compounds
Official title: by liquid-liquid extraction using organic compounds
C22B3/26 (By liquid-liquid extraction using organic compounds) appears on 1,324 US grants and 810 published applications in this corpus.
Search patents in C22B- Granted patents
- 1,324
- Published applications
- 810
- Assignees
- 734
- Inventors
- 2,803
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 50 | 0 |
| 1977 | 48 | 0 |
| 1978 | 36 | 0 |
| 1979 | 27 | 0 |
| 1980 | 48 | 0 |
| 1981 | 47 | 0 |
| 1982 | 43 | 0 |
| 1983 | 40 | 0 |
| 1984 | 42 | 0 |
| 1985 | 40 | 0 |
| 1986 | 42 | 0 |
| 1987 | 25 | 0 |
| 1988 | 31 | 0 |
| 1989 | 27 | 0 |
| 1990 | 32 | 0 |
| 1991 | 25 | 0 |
| 1992 | 18 | 0 |
| 1993 | 25 | 0 |
| 1994 | 24 | 0 |
| 1995 | 12 | 0 |
| 1996 | 8 | 0 |
| 1997 | 16 | 0 |
| 1998 | 21 | 0 |
| 1999 | 25 | 0 |
| 2000 | 14 | 0 |
| 2001 | 32 | 6 |
| 2002 | 17 | 9 |
| 2003 | 10 | 13 |
| 2004 | 16 | 26 |
| 2005 | 7 | 14 |
| 2006 | 6 | 21 |
| 2007 | 18 | 23 |
| 2008 | 10 | 16 |
| 2009 | 16 | 9 |
| 2010 | 24 | 25 |
| 2011 | 10 | 24 |
| 2012 | 18 | 28 |
| 2013 | 25 | 33 |
| 2014 | 23 | 36 |
| 2015 | 27 | 28 |
| 2016 | 30 | 27 |
| 2017 | 13 | 22 |
| 2018 | 33 | 36 |
| 2019 | 29 | 31 |
| 2020 | 25 | 27 |
| 2021 | 16 | 43 |
| 2022 | 21 | 37 |
| 2023 | 23 | 79 |
| 2024 | 34 | 62 |
| 2025 | 44 | 72 |
| 2026 | 31 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Gas-Assisted Microflow Extraction (GAME) system patent6 Oct 2026US 12,753,463 B2Phinix, LLC
- Method for separating nickel from lithium, and application thereof22 Sep 2026US 12,742,225 B2Suzhou Botree Cycling Sci & Tech Co., Ltd
- Vanadium oxide extraction from Bayer process18 Aug 2026US 12,709,550 B2Snf Group
- Method for recovering hafnium and impurity metals from hafnium-containing waste residue14 Jul 2026US 12,680,145 B2Jiangxi Zhongha New Material Co., Ltd.
- Methods for separation and recovery of rare earth elements from aqueous solutions using diglycolamide derivatives30 Jun 2026US 12,668,857 B2Battelle Energy Alliance, LLC
- Process for recovering platinum-group metal from waste catalyst by using biocyanide and ionic liquid8 Oct 2026US 2026/0308713 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
- Method of recovery of scandium8 Oct 2026US 2026/0308716 A1Nippon Steel Corporation
- Pincer-type diphenyl sulfide compound, and preparation method and use thereof1 Oct 2026US 2026/0297025 A1Hunan Institute of Science and Technology
- Methods for carbon capture and metal recovery and related systems24 Sep 2026US 2026/0284595 A1Battelle Energy Alliance, LLC
- Process for extracting nickel from gasifier slag24 Sep 2026US 2026/0285702 A1Reliance Industries Limited
Most cited
By later US patents
- Supercritical fluid extraction80US 5,356,538 AIdaho Research Foundation, Inc. · 1994
- Water-soluble polymers for recovery of metal ions from aqueous streams74US 5,766,478 AThe Regents of the University of California Office of Technology Transfer · 1998
- Extraction of metals using supercritical fluid and chelate forming legand71US 5,730,874 AIdaho Research Foundation, Inc. · 1998
- Solvent extraction63US 4,507,268 AHenkel Corporation · 1985
- Removal of heavy metals from waste water61US 4,731,187 AMiyoshi Yushi Kabushiki Kaisha · 1988