C22B 23/005
Preliminary treatment of ores
Official title: {Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process}
C22B23/005 (Preliminary treatment of ores) appears on 104 US grants and 98 published applications in this corpus.
Search patents in C22B- Granted patents
- 104
- Published applications
- 98
- Assignees
- 82
- Inventors
- 267
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 1 |
| 2006 | 2 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 5 |
| 2011 | 2 | 8 |
| 2012 | 4 | 3 |
| 2013 | 4 | 6 |
| 2014 | 2 | 3 |
| 2015 | 5 | 3 |
| 2016 | 3 | 4 |
| 2017 | 3 | 6 |
| 2018 | 3 | 5 |
| 2019 | 7 | 7 |
| 2020 | 3 | 0 |
| 2021 | 0 | 2 |
| 2022 | 3 | 1 |
| 2023 | 2 | 11 |
| 2024 | 4 | 8 |
| 2025 | 4 | 10 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Impurity control in lithium-ion battery recycling1 Sep 2026US 12,725,847 B2Bluegrass Infrastructure Partners Holdings, LLC
- Method for separating cobalt and nickel17 Mar 2026US 12,577,636 B2Mitsubishi Materials Corporation
- Systems and methods for generating hydrogen and magnetite from rock10 Feb 2026US 12,545,576 B2Ohio State Innovation Foundation
- Method for preparing nickel sulfate aqueous solution from nickel-containing raw material30 Dec 2025US 12,509,744 B2Kemco
- Treatment method for laterite nickel ore by curing and roasting-water leaching-atmospheric pressure acid leaching2 Sep 2025US 12,404,567 B2Gem Co., Ltd.
- Method for extracting nickel-cobalt-manganese from laterite nickel ore by acid leaching27 Aug 2026US 2026/0250801 A1Gem Co., Ltd.
- Method of Obtaining a Nickel Ore Concentrate, Method of Processing a Nickel Ore Concentrate, and Method of Recovering Materials Derived from Nickel Ore21 May 2026US 2026/0139342 A1New Wave Royalties Sociedad Anonima
- Process and system for recovering copper and cobalt from sulfidic materials5 Feb 2026US 2026/0035766 A1Capstone Copper Corp., d/b/a Capstone Copper
- Extraction and recovery of metals under ambient conditions29 Jan 2026US 2026/0028695 A1ZincFive, LLC
- Method for removing aluminum and method for recovering metals1 Jan 2026US 2026/0002232 A1Jx Metals Circular Solutions Co., Ltd.
Most cited
By later US patents
- Sulfuric acid leaching of nickeliferous laterite24US 4,044,096 AAmax Inc. · 1977
- Leaching cobalt from spent hydroprocessing catalysts with sulfur dioxide23US 4,432,953 AChevron Research Company · 1984
- Recovering metals from spent hydroprocessing catalysts23US 4,500,495 AChevron Research Company · 1985
- Extracting cobalt from spent hydroprocessing catalysts with cyanide19US 4,409,190 AChevron Research Company · 1983
- Process for the recovery of nickel, cobalt and manganese from their oxides and silicates17US 4,311,520 ACato Research Corporation · 1982