C22B 19/32
Refining zinc
C22B19/32 (Refining zinc) appears on 22 US grants and 22 published applications in this corpus.
Search patents in C22B- Granted patents
- 22
- Published applications
- 22
- Assignees
- 25
- Inventors
- 79
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 4 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 5 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-component flux11 Aug 2026US 12,703,050 B2Pyrotek, Inc.
- Method for recycling zinc (Zn)7 Apr 2026US 12,595,533 B2Reazn Belgium
- Metal and tin alloy having low alpha-ray emission, and method for producing same4 Jun 2024US 12,000,020 B2Mitsubishi Materials Corporation
- Ultrasonic probes with gas outlets for degassing of molten metals11 Jun 2019US 10,316,387 B2Southwire Company
- Zinc production method20 Mar 2018US 9,920,398 B2Kinotech Solar Energy Corporation
- Method for processing zinc concentrates5 Jun 2025US 2025/0179611 A1Glencore Technology Pty Limited
- Method for removing chlorine in zinc hydrometallurgy14 Nov 2024US 2024/0376565 A1Korea Zinc Co., Ltd.
- Method for manufacturing high-grade refined iron oxide from iron oxide as by-product of zinc smelting process17 Oct 2024US 2024/0344173 A1Korea Zinc Co., Ltd.
- Improved method for recycling zinc (zn)8 Aug 2024US 2024/0263269 A1Reazn Belgium
- Device for preparing ultra-high-purity zinc based on intelligently-controlled zone melting11 Jul 2024US 2024/0229193 A9Shaanxi Zinc Industry Co., Ltd.
Most cited
By later US patents
- Device and method for obtaining non-ferrous metals86US 8,480,950 B2Pyrotek, Inc. · 2013
- Process for refining molten metal11US 4,047,938 AUnion Carbide Corporation · 1977
- Metal distillation method utilizing double vaporization11US 4,695,319 AToyota Jidosha Kabushiki Kaisha · 1987
- Process for separating molten metals11US 6,387,154 B1Th. Goldschmidt AG · 2002
- System for dissolution-purification of Zn-containing materials10US 4,689,146 ASumitomo Metal Industries, Ltd. · 1987