C22B 19/24
With leaching with alkaline solutions
Official title: {with leaching with alkaline solutions, e.g. ammonia}
C22B19/24 (With leaching with alkaline solutions) appears on 52 US grants and 28 published applications in this corpus.
Search patents in C22B- Granted patents
- 52
- Published applications
- 28
- Assignees
- 42
- Inventors
- 112
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 2 | 3 |
| 2014 | 1 | 1 |
| 2015 | 1 | 3 |
| 2016 | 3 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 2 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 3 |
| 2024 | 1 | 0 |
| 2025 | 1 | 3 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integrated recovery of metals from complex substrates22 Sep 2026US 12,742,224 B2Yava International Inc.
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Method for recovering valuable materials from batteries7 Jul 2026US 12,676,351 B2University of Kentucky Research Foundation
- Ammonium complex system-based method for separating and purifying lead, zinc, cadmium, and copper31 Mar 2026US 12,590,352 B2GreenNovo Environmental Technology Co., Ltd
- Method for removing arsenic from copper smelting soot and comprehensive recovery of valuable metals4 Feb 2025US 12,215,406 B1Shandong Humon Smelting Co., Ltd.
- Zinc recovery method and zinc ferrite decomposition method6 Aug 2026US 2026/0226582 A1Kinotech Corporation
- Methods of extracting metals by electrochemical processing of a sulfoarsenide compound21 May 2026US 2026/0139400 A1Battelle Energy Alliance, LLC
- Carbonation and selective leaching for the recovery of metals14 Aug 2025US 2025/0257423 A1Phoenix Tailings, Inc.
- Compositions and processes for the extraction of metals using non-aqueous solvents1 May 2025US 2025/0137090 A1Argo Natural Resources Limited
- Method for recovering valuable materials from batteries23 Jan 2025US 2025/0030074 A1University of Kentucky Research Foundation
Most cited
By later US patents
- Method of extracting zinc from brines34US 5,246,684 ACyprus Power Company · 1993
- Process for recovering zinc from steel-making flue dust28US 4,071,357 AHazen Research, Inc. · 1978
- Method for the recovery of zinc oxide21US 5,208,004 AMetals Recycling Technologies Corp. · 1993
- Methods for recycling electric arc furnace dust21US 5,667,553 AComplete Recovery Process · 1997
- Recovery of metals19US 4,022,866 AThe Anaconda Company · 1977