C22B 19/28
From muffle furnace residues
Official title: from muffle furnace residues
C22B19/28 (From muffle furnace residues) appears on 41 US grants and 25 published applications in this corpus.
Search patents in C22B- Granted patents
- 41
- Published applications
- 25
- Assignees
- 27
- Inventors
- 72
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 1 |
| 2004 | 4 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 4 |
| 2008 | 1 | 3 |
| 2009 | 2 | 0 |
| 2010 | 2 | 2 |
| 2011 | 2 | 3 |
| 2012 | 1 | 1 |
| 2013 | 2 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Metal recovery process12 Aug 2025US 12,385,106 B2Minex Technology Group Limited
- Pyro-metallurgical process in a rotary kiln25 Jun 2024US 12,018,345 B2S. A. Lhoist Recherche et Developpement
- Zinc production method20 Mar 2018US 9,920,398 B2Kinotech Solar Energy Corporation
- Apparatus and method for treating exhaust gas28 Jun 2016US 9,375,667 B2Arcelormittal Investigacion Y Desarrollo, S.L.
- Metal recovery process3 Feb 2015US 8,945,489 B2Minex Technologies Limited
- Method for the Separation of Zinc and Iron from Electric Arc Furnace Baghouse Dust6 Aug 2026US 2026/0225092 A1American Renewable Metals LLC
- Method for removing halide from waelz oxide7 Nov 2024US 2024/0368729 A1Korea Zinc Co., Ltd.
- Metal recovery process13 Oct 2022US 2022/0325375 A1Minex Technology Group Limited
- Pyro-metallurgical process in a rotary kiln9 Jun 2022US 2022/0178001 A1S. A. Lhoist Recherche et Developpement
- Zinc production method19 May 2016US 2016/0138130 A1Kinotech Solar Energy Corporation
Most cited
By later US patents
- Method for the recovery of zinc oxide21US 5,208,004 AMetals Recycling Technologies Corp. · 1993
- Method for treating waste streams containing zinc13US 5,464,596 AMetals Recycling Technologies Corp. · 1995
- Method for recovering zinc from zinc-containing waste materials10US 5,188,658 AElkem Technology a/s · 1993
- Method for separation of metals from waste stream10US 5,453,111 AMetals Recycling Technologies Corp. · 1995
- Method of reprocessing metallurgical residues, which contain zinc and lead10US 5,474,592 AMetallgesellschaft Aktiengesellschaft · 1995