C22B 15/0052
Reduction smelting or converting
Official title: {Reduction smelting or converting}
C22B15/0052 (Reduction smelting or converting) appears on 52 US grants and 45 published applications in this corpus.
Search patents in C22B- Granted patents
- 52
- Published applications
- 45
- Assignees
- 38
- Inventors
- 161
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 2 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 4 |
| 2016 | 0 | 2 |
| 2017 | 4 | 2 |
| 2018 | 2 | 4 |
| 2019 | 4 | 3 |
| 2020 | 1 | 1 |
| 2021 | 0 | 4 |
| 2022 | 4 | 2 |
| 2023 | 3 | 7 |
| 2024 | 2 | 6 |
| 2025 | 4 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for co-producing blister copper by enriching germanium and indium from a copper sulfide ore7 Oct 2025US 12,435,388 B2Honghe University
- Copper smelting process29 Apr 2025US 12,286,684 B2Aurubis Beerse
- Gasification or liquefaction of coal using a metal reactant alloy composition4 Mar 2025US 12,241,132 B2
- Operation method of copper smelting furnace25 Feb 2025US 12,234,528 B2Jx Metals Smelting Co., Ltd.
- Process for transition metal oxide reduction1 Oct 2024US 12,104,224 B2Helios Project Ltd.
- Gasification or Liquefaction of Coal Using a Metal Reactant Alloy Composition19 Jun 2025US 2025/0197955 A1
- Production method for valuable metals15 May 2025US 2025/0158147 A1Sumitomo Metal Mining Co., Ltd.
- Treatment of zinc leach residue13 Mar 2025US 2025/0084503 A1Glencore Technology Pty Limited
- Geothermally powered pyrometallurgical copper production27 Feb 2025US 2025/0066873 A1EnhancedGEO Holdings, LLC
- Process for Transition Metal Oxide Reduction5 Dec 2024US 2024/0401168 A1Helios Project Ltd.
Most cited
By later US patents
- Method and apparatus for simultaneously separating volatile and non-volatile metals13US 4,606,760 AFritz Enterprises, Inc. · 1986
- Treatment of metal sulphide concentrates by roasting and electrically stabilized open-arc furnace smelt reduction13US 6,699,302 B1Mintek · 2004
- Production of blister copper directly from dead roasted-copper-iron concentrates using a shallow bed reactor12US 4,006,010 AAmax Inc. · 1977
- Smelting reduction10US 4,701,217 AThe University of Birmingham · 1987
- Metal recovery process8US 4,164,416 ARockwell International Corporation · 1979