C22B 3/1608
Leaching with acyclic or carbocyclic agents
Official title: {Leaching with acyclic or carbocyclic agents}
C22B3/1608 (Leaching with acyclic or carbocyclic agents) appears on 172 US grants and 194 published applications in this corpus.
Search patents in C22B- Granted patents
- 172
- Published applications
- 194
- Assignees
- 196
- Inventors
- 641
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 5 | 3 |
| 2003 | 1 | 1 |
| 2004 | 2 | 2 |
| 2005 | 2 | 2 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 3 |
| 2009 | 1 | 3 |
| 2010 | 2 | 6 |
| 2011 | 3 | 4 |
| 2012 | 3 | 3 |
| 2013 | 1 | 2 |
| 2014 | 1 | 8 |
| 2015 | 2 | 2 |
| 2016 | 7 | 9 |
| 2017 | 3 | 7 |
| 2018 | 3 | 8 |
| 2019 | 9 | 7 |
| 2020 | 10 | 6 |
| 2021 | 4 | 7 |
| 2022 | 5 | 13 |
| 2023 | 7 | 19 |
| 2024 | 8 | 26 |
| 2025 | 7 | 25 |
| 2026 | 10 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Selective recovery of Li18 Aug 2026US 12,709,786 B2Gelion Technologies Pty Ltd
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Methods and systems for leaching a metal-bearing material26 May 2026US 12,637,735 B2Freeport Minerals Corporation
- Integrated method for the commercial and industrial utilisation of calcium sulphate whilst obtaining rare earth elements from the production of phosphoric acid28 Apr 2026US 12,612,309 B2thyssenkrupp AG
- Hydrometallurgical recycling of lithium-ion battery electrodes7 Apr 2026US 12,597,651 B2Queen's University at Kingston
- Process for the extraction of a by-product metal from a mineral concentrate8 Oct 2026US 2026/0308710 A1
- Extraction of radium from phosphogypsum17 Sep 2026US 2026/0275454 A1The Florida State University Research Foundation, Inc.
- Method for leaching rock metal component, method for storing carbon dioxide underground, and method for fixing carbon dioxide17 Sep 2026US 2026/0275851 A1Tohoku University
- Method For Treating Phosphate Ores Containing Heavy Metals By Reverse Flotation13 Aug 2026US 2026/0234747 A1Ocp SA
- Process for extracting metals from lithium-ion batteries13 Aug 2026US 2026/0234749 A1Arabat S.R.L.
Most cited
By later US patents
- Supercritical fluid extraction80US 5,356,538 AIdaho Research Foundation, Inc. · 1994
- Extraction of metals using supercritical fluid and chelate forming legand71US 5,730,874 AIdaho Research Foundation, Inc. · 1998
- Methods and devices for the separation of radioactive rare earth metal isotopes from their alkaline earth metal precursors59US 5,225,173 AIdaho Research Foundation, Inc. · 1993
- Hydroxamic acid crown ethers58US 5,274,129 AIdaho Research Foundation, Inc. · 1993
- Recovery of gold from aqueous solutions51US 4,913,730 ACanadian Patents and Development Limited · 1990