C22B 3/22
By physical processes
Official title: by physical processes, e.g. by filtration, by magnetic means {, or by thermal decomposition} (treatment or purification of solutions by liquid-liquid extraction C22B3/26)
C22B3/22 (By physical processes) appears on 771 US grants and 1,098 published applications in this corpus.
Search patents in C22B- Granted patents
- 771
- Published applications
- 1,098
- Assignees
- 768
- Inventors
- 2,908
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 13 | 0 |
| 1981 | 12 | 0 |
| 1982 | 9 | 0 |
| 1983 | 20 | 0 |
| 1984 | 16 | 0 |
| 1985 | 11 | 0 |
| 1986 | 15 | 0 |
| 1987 | 7 | 0 |
| 1988 | 16 | 0 |
| 1989 | 12 | 0 |
| 1990 | 14 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 8 |
| 2003 | 6 | 9 |
| 2004 | 8 | 12 |
| 2005 | 11 | 14 |
| 2006 | 6 | 12 |
| 2007 | 6 | 7 |
| 2008 | 5 | 26 |
| 2009 | 10 | 23 |
| 2010 | 10 | 24 |
| 2011 | 13 | 22 |
| 2012 | 17 | 17 |
| 2013 | 20 | 20 |
| 2014 | 14 | 16 |
| 2015 | 15 | 33 |
| 2016 | 18 | 33 |
| 2017 | 14 | 32 |
| 2018 | 28 | 28 |
| 2019 | 27 | 38 |
| 2020 | 31 | 45 |
| 2021 | 30 | 43 |
| 2022 | 34 | 63 |
| 2023 | 28 | 107 |
| 2024 | 43 | 149 |
| 2025 | 74 | 182 |
| 2026 | 62 | 133 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for recovering lithium and method for processing lithium ion secondary battery22 Sep 2026US 12,744,261 B2Dowa Eco-System Co., Ltd.
- Method for extracting metals from saprolite laterite nickel ore1 Sep 2026US 12,723,318 B2Gem Co., Ltd.
- Method for recycling iron ore tailing and use thereof25 Aug 2026US 12,716,113 B2Baotou Research Institute of Rare Earths
- Method for improving lithium yield in a direct lithium extraction process11 Aug 2026US 12,702,987 B2Aquatech International Corporation
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Oxime-based adsorbents and methods of use for selective separation of rare earth elements8 Oct 2026US 2026/0307049 A1The Board of Regents of the University of Oklahoma
- Synthesis of bio-based catecholic acid- and derivatives-functionalized adsorbents for recovery of metals and metalloids from acidic solutions8 Oct 2026US 2026/0307051 A1The Penn State Research Foundation
- Process for the extraction of a by-product metal from a mineral concentrate8 Oct 2026US 2026/0308710 A1
- Method of recovery of scandium8 Oct 2026US 2026/0308716 A1Nippon Steel Corporation
- Process for using modified dtpa-associated organosilica media for producing individually separated high purity rare earth elements8 Oct 2026US 2026/0308717 A1Wayne State University
Most cited
By later US patents
- Surface-functionalized mesoporous carbon materials255US 9,249,241 B2UT-Battelle, LLC · 2016
- Adsorbent compositions173US 4,474,896 AUnion Carbide Corporation · 1984
- Process for the recovery of gold from carbonaceous ores66US 4,289,532 AFreeport Minerals Corporation · 1981
- Silver removal with halogen impregnated activated carbon65US 4,394,354 ACalgon Carbon Corporation · 1983
- Hg removal from wastewater by regenerative adsorption62US 5,080,799 AMobil Oil Corporation · 1992