C22B 11/044
From pyrometallurgical residues
Official title: {from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge}
C22B11/044 (From pyrometallurgical residues) appears on 34 US grants and 36 published applications in this corpus.
Search patents in C22B- Granted patents
- 34
- Published applications
- 36
- Assignees
- 40
- Inventors
- 111
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 3 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 3 |
| 2016 | 2 | 4 |
| 2017 | 1 | 0 |
| 2018 | 1 | 3 |
| 2019 | 1 | 1 |
| 2020 | 4 | 3 |
| 2021 | 1 | 3 |
| 2022 | 3 | 0 |
| 2023 | 3 | 3 |
| 2024 | 1 | 4 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integrated recovery of metals from complex substrates22 Sep 2026US 12,742,224 B2Yava International Inc.
- Method of separating and recovering bromine from printed circuit board incineration ash by two-step process2 Jan 2024US 11,858,822 B2Beijing University of Technology
- Recovery of precious metals from copper anode slime14 Nov 2023US 11,814,699 B2Amirkabir University of Technolog
- Method for recovering metals from secondary materials and other materials comprising organic constituents15 Aug 2023US 11,725,256 B2Aurubis AG
- Method for disposal of waste printed circuit board thermal cracking slag and smelting soot4 Jul 2023US 11,692,238 B2Beijing University of Technology
- Novel pseudomonas strain for metal recovery11 Jul 2024US 2024/0229187 A9
- Method for the treatment of residues from the zinc and lead production industry, with obtainment of exploitable products and secondary raw materials, according to the strategies of the circular economy9 May 2024US 2024/0150868 A1Ecotec Gestione Impianti S.R.L.
- Novel pseudomonas strain for metal recovery25 Apr 2024US 2024/0132992 A1
- Method for selective extraction of gold by niacin18 Jan 2024US 2024/0018624 A1Indian Institute of Technology Madras (Iit Madras)
- A method of separating and recovering bromine from printed circuit board incineration ash by two-step process22 Jun 2023US 2023/0192488 A1Beijing University of Technology
Most cited
By later US patents
- Recovery of precious metals from a thiourea leach61US 4,778,519 A1988
- Silver and manganese recovery using acidified thiourea38US 4,816,235 A1989
- Process for recovering platinum group metals from material containing base metals20US 7,033,480 B2Placer Dome Technical Services Limited · 2006
- Recovery of silver and gold8US 4,662,938 A1987
- Method for concentrating precious metals contained in leaching residue discharged from copper hydrometallurgical process7US 7,422,621 B2Sumitomo Metal Mining Co., Ltd. · 2008