C22B 23/0407
Leaching processes
Official title: {Leaching processes}
C22B23/0407 (Leaching processes) appears on 526 US grants and 692 published applications in this corpus.
Search patents in C22B- Granted patents
- 526
- Published applications
- 692
- Assignees
- 375
- Inventors
- 1,514
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 11 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 10 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 16 | 0 |
| 1984 | 15 | 0 |
| 1985 | 13 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 1 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 1 |
| 2002 | 11 | 6 |
| 2003 | 3 | 3 |
| 2004 | 4 | 7 |
| 2005 | 2 | 7 |
| 2006 | 4 | 8 |
| 2007 | 1 | 7 |
| 2008 | 6 | 13 |
| 2009 | 8 | 11 |
| 2010 | 7 | 19 |
| 2011 | 10 | 19 |
| 2012 | 13 | 12 |
| 2013 | 11 | 14 |
| 2014 | 13 | 19 |
| 2015 | 16 | 30 |
| 2016 | 12 | 23 |
| 2017 | 18 | 13 |
| 2018 | 22 | 19 |
| 2019 | 11 | 11 |
| 2020 | 17 | 25 |
| 2021 | 12 | 24 |
| 2022 | 13 | 33 |
| 2023 | 15 | 71 |
| 2024 | 37 | 99 |
| 2025 | 48 | 119 |
| 2026 | 34 | 79 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integration of carbon sequestration with selective hydrometallurgical recovery of metal values22 Sep 2026US 12,742,226 B2Negative Emissions Materials, Inc.
- Impurity control in lithium-ion battery recycling1 Sep 2026US 12,725,847 B2Bluegrass Infrastructure Partners Holdings, LLC
- Methods for battery-grade aqueous solutions of nickel salts18 Aug 2026US 12,709,552 B2Bluegrass Infrastructure Partners Holdings, LLC
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Methods for preparing cathode active material precursor material and cathode active material for lithium secondary battery, and cathode active material for lithium secondary battery prepared according to same14 Jul 2026US 12,683,207 B2Dongwoo Fine-Chem Co., Ltd.
- Process for extracting nickel from gasifier slag24 Sep 2026US 2026/0285702 A1Reliance Industries Limited
- Method for recovering metals from waste battery using magnetic field applied biological leaching process10 Sep 2026US 2026/0265858 A1Ak Tree Co., Ltd.
- Process10 Sep 2026US 2026/0265863 A1Velocys Technologies Limited
- Systems and methods for combined co2 storage and metal extraction from ultramafic rock and mine tailings10 Sep 2026US 2026/0265864 A1The Trustees of Columbia University in the City of New York
- Method of recycling waste ionomer membrane3 Sep 2026US 2026/0258524 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- Chloride assisted hydrometallurgical copper extraction52US 5,431,788 ACominco Engineering Services Ltd. · 1995
- Process for recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum48US 4,145,397 AFuji Fine Chemical Co. Ltd. · 1979
- Process for smelting nickel47US 4,466,828 AToyo Engineering Corporation · 1984
- Recovery of V.sub.2 O.sub.5 and nickel values from petroleum coke45US 4,443,415 AAmax Inc. · 1984
- Chloride assisted hydrometallurgical extraction of metal42US 5,902,474 ACominco Engineering Services Ltd. · 1999