C22B 15/0002
Preliminary treatment
Official title: {Preliminary treatment}
C22B15/0002 (Preliminary treatment) appears on 187 US grants and 187 published applications in this corpus.
Search patents in C22B- Granted patents
- 187
- Published applications
- 187
- Assignees
- 176
- Inventors
- 614
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 9 | 0 |
| 1978 | 11 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 9 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 2 |
| 2004 | 2 | 2 |
| 2005 | 1 | 7 |
| 2006 | 2 | 5 |
| 2007 | 1 | 2 |
| 2008 | 2 | 7 |
| 2009 | 6 | 2 |
| 2010 | 5 | 8 |
| 2011 | 3 | 6 |
| 2012 | 3 | 4 |
| 2013 | 5 | 6 |
| 2014 | 5 | 5 |
| 2015 | 4 | 8 |
| 2016 | 6 | 11 |
| 2017 | 6 | 8 |
| 2018 | 6 | 8 |
| 2019 | 8 | 9 |
| 2020 | 9 | 3 |
| 2021 | 2 | 6 |
| 2022 | 3 | 10 |
| 2023 | 6 | 11 |
| 2024 | 6 | 14 |
| 2025 | 5 | 22 |
| 2026 | 11 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Copper-tin-nickel brazing material prepared by alloys recycled from E-waste, preparation method therefor and system thereof15 Sep 2026US 12,735,765 B2Zhengzhou Research Institute of Mechanical Engineering Co., Ltd.
- Binder for an agglomeration process8 Sep 2026US 12,729,161 B2Mintek
- Method for recovering valuable substance25 Aug 2026US 12,716,112 B2Dowa Eco-System Co., Ltd.
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Valuable matter recovery method11 Aug 2026US 12,706,333 B2Dowa Eco-System Co., Ltd.
- Systems and methods for improved metal recovery by leaching8 Oct 2026US 2026/0308711 A1Freeport Minerals Corporation
- Systems and methods for improved metal recovery by leaching8 Oct 2026US 2026/0308712 A1Freeport Minerals Corporation
- Method for processing target material comprising clump-shaped copper wire scraps10 Sep 2026US 2026/0264113 A1JX Advanced Metals Corporation
- Methods and systems for leaching a metal-bearing material using sulfinates20 Aug 2026US 2026/0242892 A1Freeport Minerals Corporation
- Separation liquid and method for recovery of metal-inorganic composite electrode assembly13 Aug 2026US 2026/0233271 A1Rikomay Recycling Singapore Pte. Ltd.
Most cited
By later US patents
- Processes and intermediates for preparing anti-cancer compounds70US 6,476,040 B1Pfizer Inc. · 2002
- Recovery of copper values from copper ores56US 6,319,389 B1Hydromet Systems, L.L.C. · 2001
- Hydrometallurgical process for extracting copper from chalcopyrite or bornite concentrates52US 3,949,051 A1976
- Method for separating metal constituents from ocean floor nodules46US 4,042,664 ADeepsea Ventures, Inc. · 1977
- Anionic acrylamide polymers as copper ore agglomeration aids36US 4,875,935 ANalco Chemical Company · 1989