C22B 19/20
Obtaining zinc otherwise than by distilling
C22B19/20 (Obtaining zinc otherwise than by distilling) appears on 319 US grants and 186 published applications in this corpus.
Search patents in C22B- Granted patents
- 319
- Published applications
- 186
- Assignees
- 239
- Inventors
- 721
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 8 | 0 |
| 1978 | 9 | 0 |
| 1979 | 10 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 6 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 12 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 11 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 2 |
| 2002 | 12 | 6 |
| 2003 | 3 | 7 |
| 2004 | 10 | 8 |
| 2005 | 6 | 5 |
| 2006 | 3 | 5 |
| 2007 | 1 | 7 |
| 2008 | 2 | 9 |
| 2009 | 4 | 2 |
| 2010 | 7 | 5 |
| 2011 | 5 | 4 |
| 2012 | 2 | 6 |
| 2013 | 9 | 11 |
| 2014 | 2 | 10 |
| 2015 | 8 | 7 |
| 2016 | 9 | 13 |
| 2017 | 6 | 4 |
| 2018 | 9 | 3 |
| 2019 | 5 | 4 |
| 2020 | 6 | 9 |
| 2021 | 5 | 11 |
| 2022 | 7 | 1 |
| 2023 | 3 | 14 |
| 2024 | 7 | 13 |
| 2025 | 6 | 12 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Method for recovering metal zinc from solid metallurgical wastes19 May 2026US 12,630,900 B2Engitec Technologies S.P.A.
- System and method for recovering constituents from batteries12 May 2026US 12,626,931 B2Environmental 360 Solutions Ltd.
- Methods for reducing metal oxides with ammonia gas10 Sep 2026US 2026/0265846 A1Trustees of Tufts College
- 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
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