C22B 15/0015
Oxidizing roasting
Official title: {Oxidizing roasting}
C22B15/0015 (Oxidizing roasting) appears on 19 US grants and 9 published applications in this corpus.
Search patents in C22B- Granted patents
- 19
- Published applications
- 9
- Assignees
- 20
- Inventors
- 64
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 2 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing copper metal from copper concentrates without generating waste26 May 2026US 12,637,738 B2Universidad De Concepcion
- Method for recovering valuable metal7 Nov 2023US 11,807,914 B2Sumitomo Metal Mining Co., Ltd.
- Treatment of complex sulfide concentrate10 Dec 2019US 10,501,824 B2Outotec (Finland) Oy
- Method for the microwave induced oxidation of pyritic ores without the production of sulphur dioxide26 Oct 1999US 5,972,302 AEMR Microwave Technology Corporation
- Process for removing copper in a recoverable form from solid scrap metal7 Feb 1995US 5,387,273 AThe United States of America as represented by the Secretary of the Interior
- Method for recovering valuable metals17 Apr 2025US 2025/0125433 A1Sumitomo Metal Mining Co., Ltd.
- Method for processing alloy2 Jan 2025US 2025/0003027 A1Sumitomo Metal Mining Co., Ltd.
- Method for recovering valuable metal6 Jul 2023US 2023/0212713 A1Sumitomo Metal Mining Co., Ltd.
- Method for recovering valuable metal18 May 2023US 2023/0151453 A1Sumitomo Metal Mining Co., Ltd.
- Method for producing copper metal from copper concentrates without generating waste15 Dec 2022US 2022/0396851 A1Universidad De Concepcion
Most cited
By later US patents
- Flash smelting process10US 4,615,729 AInco Limited · 1986
- Method for separating and recovering nickel and copper from complex materials8US 4,585,477 ABoliden Aktiebolag · 1986
- Method for processing copper smelting materials and the like containing high percentages of arsenic and/or antimony8US 4,626,279 ABoliden Aktiebolag · 1986
- Method for the microwave induced oxidation of pyritic ores without the production of sulphur dioxide8US 5,972,302 AEMR Microwave Technology Corporation · 1999
- Roast-reductive leach process for copper recovery7US 4,135,918 AThe International Nickel Company, Inc. · 1979