C22B 7/008
By an alkaline or ammoniacal leaching
Official title: {by an alkaline or ammoniacal leaching}
C22B7/008 (By an alkaline or ammoniacal leaching) appears on 190 US grants and 225 published applications in this corpus.
Search patents in C22B- Granted patents
- 190
- Published applications
- 225
- Assignees
- 197
- Inventors
- 629
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 1 |
| 2003 | 5 | 4 |
| 2004 | 2 | 7 |
| 2005 | 6 | 5 |
| 2006 | 1 | 4 |
| 2007 | 2 | 4 |
| 2008 | 1 | 5 |
| 2009 | 4 | 7 |
| 2010 | 5 | 5 |
| 2011 | 0 | 6 |
| 2012 | 5 | 6 |
| 2013 | 4 | 4 |
| 2014 | 3 | 6 |
| 2015 | 5 | 4 |
| 2016 | 7 | 11 |
| 2017 | 2 | 7 |
| 2018 | 6 | 5 |
| 2019 | 6 | 8 |
| 2020 | 7 | 5 |
| 2021 | 6 | 8 |
| 2022 | 7 | 17 |
| 2023 | 2 | 32 |
| 2024 | 9 | 25 |
| 2025 | 14 | 17 |
| 2026 | 14 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method for reusing active material by using positive electrode scrap22 Sep 2026US 12,741,884 B2LG Energy Solution, Ltd.
- Method for recovering noble metals from catalytic converter15 Sep 2026US 12,735,768 B2National Ilan University
- Metals recovery from spent catalyst11 Aug 2026US 12,703,892 B2Chevron U.S.A.Inc.
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- Method for producing high purity lithium sulfate from waste saggar17 Sep 2026US 2026/0274698 A1Koreaseparation Co., Ltd.
- Method for the recovery of metals from e-waste10 Sep 2026US 2026/0265859 A1Renewable Metals Pty Ltd
- Method for recovering rare earth elements from rare earth permanent magnets by using deep eutectic solvent10 Sep 2026US 2026/0265868 A1Korea Institute of Geoscience and Mineral Resources
- Lithium recovery from slags20 Aug 2026US 2026/0242895 A1Umicore AG & Co. KG
Most cited
By later US patents
- 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
- Method for recycling of obsolete printed circuit boards36US 9,215,813 B2Advanced Technology Materials, Inc. · 2015
- Process for recovering lead oxides from exhausted batteries33US 7,507,496 B1Kinsbursky Brothers Inc · 2009
- Process to recover metals from spent catalyst31US 6,180,072 B2Shell Oil Company · 2001
- Process for recovering valuable metals from superalloy scrap30US 4,138,249 ACabot Corporation · 1979