C22B 11/023
From pyrometallurgical residues
Official title: {from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge}
C22B11/023 (From pyrometallurgical residues) appears on 23 US grants and 20 published applications in this corpus.
Search patents in C22B- Granted patents
- 23
- Published applications
- 20
- Assignees
- 26
- Inventors
- 88
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 3 |
| 2015 | 3 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 3 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for the production of a collector alloy comprising precious metal or of pure silver15 Jul 2025US 12,359,283 B2Heraeus Deutschland GmbH & Co. KG
- Pyro-metallurgical process in a rotary kiln25 Jun 2024US 12,018,345 B2S. A. Lhoist Recherche et Developpement
- Method and system for comprehensive recovery and utilization of copper-nickel sulfide ore4 Oct 2022US 11,459,636 B2Central South University
- Process for the recovery of precious metal from petrochemical process residues26 May 2020US 10,662,500 B2Heraeus Deutschland GmbH & Co. KG
- Process and system for recycling E-waste material10 Mar 2020US 10,584,399 B2BlueOak Arkansas
- Method for the incineration of waste containing fluorine and noble metals7 May 2026US 2026/0124651 A1Heraeus Precious Metals GmbH & Co. KG
- Treatment of zinc leach residue13 Mar 2025US 2025/0084503 A1Glencore Technology Pty Limited
- Method for the production of a collector alloy comprising precious metal or of pure silver16 Mar 2023US 2023/0078641 A1Heraeus Deutschland GmbH & Co. KG
- Method for recovering pgm18 Aug 2022US 2022/0259697 A1Dowa Metals & Mining Co., Ltd.
- Pyro-metallurgical process in a rotary kiln9 Jun 2022US 2022/0178001 A1S. A. Lhoist Recherche et Developpement
Most cited
By later US patents
- Extraction of trace metals from fly ash43US 4,475,993 AThe United States of America as represented by the United States Department of Energy · 1984
- Method for recovering trace elements from coal36US 6,827,837 B22004
- Treatment of anode slimes in a top blown rotary converter29US 4,581,064 ANoranda Inc. · 1986
- Recovery of precious metals from metal alloys produced aluminothermically from base metal smelter slag8US 6,440,194 B1Fenicem Minerals Inc. · 2002
- Dore slag treatment7US 4,404,022 ANoranda Mines Limited · 1983