C22B 19/02
Preliminary treatment of ores
Official title: Preliminary treatment of ores; Preliminary refining of zinc oxide
C22B19/02 (Preliminary treatment of ores) appears on 39 US grants and 29 published applications in this corpus.
Search patents in C22B- Granted patents
- 39
- Published applications
- 29
- Assignees
- 41
- Inventors
- 95
- Latest grant
- 3 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
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| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
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| 1983 | 1 | 0 |
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| 1997 | 1 | 0 |
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| 1999 | 1 | 0 |
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| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 1 | 4 |
| 2005 | 2 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 1 | 3 |
| 2015 | 2 | 1 |
| 2016 | 3 | 4 |
| 2017 | 1 | 0 |
| 2018 | 3 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 4 |
| 2025 | 0 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for recovering non-ferrous metals from industrial mineral residues3 Dec 2024US 12,157,928 B2Vito NV
- Rotation-suspension smelting method, a burner and a metallurgical equipment4 Dec 2018US 10,144,988 B2Yanggu Xiangguang Copper Co., Ltd.
- Process for recovering value metals from ore13 Nov 2018US 10,124,346 B2Anglo American Services (UK) Ltd.
- Zinc production method20 Mar 2018US 9,920,398 B2Kinotech Solar Energy Corporation
- Method for producing metal zinc15 Aug 2017US 9,732,399 B2Zincox Resources PLC
- Zinc recovery method and zinc ferrite decomposition method6 Aug 2026US 2026/0226582 A1Kinotech Corporation
- Process and system for recovering copper and cobalt from sulfidic materials5 Feb 2026US 2026/0035766 A1Capstone Copper Corp., d/b/a Capstone Copper
- Zinc Production Powered by Geothermal Energy20 Feb 2025US 2025/0059622 A1EnhancedGEO Holdings, LLC
- Geothermally Powered Pyrometallurgical Zinc Production20 Feb 2025US 2025/0060163 A1EnhancedGEO Holdings, LLC
- Method for removing chlorine in zinc hydrometallurgy14 Nov 2024US 2024/0376565 A1Korea Zinc Co., Ltd.
Most cited
By later US patents
- Method of ore processing19US 9,447,480 B2The University of Queensland · 2016
- Process for leaching zinc from partially desulfurized zinc concentrates by sulfuric acid8US 4,778,520 AUniversity of Waterloo · 1988
- Recovery of zinc values from zinc and iron-bearing sulfide materials8US 4,889,694 AUniversity of Waterloo · 1989
- Method for ammoniacal leaching6US 8,388,729 B2Metaleach Limited · 2013
- Process for the extraction of zinc from sulphide concentrates5US 5,858,315 AN. V. Union Miniere S.A. · 1999