C22B 19/26
Refining solutions containing zinc values
Official title: {Refining solutions containing zinc values, e.g. obtained by leaching zinc ores (treatment or purification of solutions by liquid-liquid extraction, by ion exchange or by adsorption C22B3/00)}
C22B19/26 (Refining solutions containing zinc values) appears on 149 US grants and 76 published applications in this corpus.
Search patents in C22B- Granted patents
- 149
- Published applications
- 76
- Assignees
- 106
- Inventors
- 319
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 7 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 10 | 4 |
| 2003 | 3 | 4 |
| 2004 | 8 | 6 |
| 2005 | 5 | 5 |
| 2006 | 2 | 3 |
| 2007 | 1 | 6 |
| 2008 | 2 | 7 |
| 2009 | 2 | 0 |
| 2010 | 5 | 3 |
| 2011 | 5 | 3 |
| 2012 | 1 | 1 |
| 2013 | 2 | 3 |
| 2014 | 2 | 3 |
| 2015 | 2 | 1 |
| 2016 | 2 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 3 |
| 2021 | 2 | 6 |
| 2022 | 6 | 0 |
| 2023 | 1 | 4 |
| 2024 | 1 | 3 |
| 2025 | 1 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for recovering metal zinc from solid metallurgical wastes19 May 2026US 12,630,900 B2Engitec Technologies S.P.A.
- Ammonium complex system-based method for separating and purifying lead, zinc, cadmium, and copper31 Mar 2026US 12,590,352 B2GreenNovo Environmental Technology Co., Ltd
- Sustainable method for recycling smelting works dusts and sludges to produce iron-containing, heavy-metal-depleted reclaimed materials with recovery of lead and zinc21 Oct 2025US 12,448,666 B2ThyssenKrupp Steel Europe AG
- Process for recovering components from alkaline batteries22 Oct 2024US 12,125,996 B2Fortum Oyj
- Method of extracting metals from polymetallic sulphide ores or concentrates24 Jan 2023US 11,560,609 B2Cobre Las Cruces, S.A.U.
- Method for the Separation of Zinc and Iron from Electric Arc Furnace Baghouse Dust6 Aug 2026US 2026/0225092 A1American Renewable Metals LLC
- Zinc recovery method and zinc ferrite decomposition method6 Aug 2026US 2026/0226582 A1Kinotech Corporation
- Method of preparing zinc-containing material, method of preparing electrogalvanizing bath, and method of producing electrogalvanized steel sheet30 Jul 2026US 2026/0218332 A1Jfe Steel Corporation
- Recovery of energy critical high value metals using functionalized materials23 Jul 2026US 2026/0209979 A1Cornell University
- Method for the Elution of Aluminum Ions and/or Zinc Ions12 Jun 2025US 2025/0188564 A1LANXESS Deutschland GmbH
Most cited
By later US patents
- Chloride assisted hydrometallurgical copper extraction52US 5,431,788 ACominco Engineering Services Ltd. · 1995
- Chloride assisted hydrometallurgical extraction of metal42US 5,902,474 ACominco Engineering Services Ltd. · 1999
- Recovery of zinc from geothermal brines40US 6,458,184 B2MidAmerican Energy Holdings Company · 2002
- Method for removing soluble selenium from acidic waste water38US 3,933,635 AThe United States of America as represented by the Secretary of the Interior · 1976
- Method of recovering metal from metalliferous waste37US 3,966,569 AMX Processor Reinhardt & Co. AB · 1976