C22B 23/0415
With acids or salt solutions except ammonium salts solutions
Official title: {with acids or salt solutions except ammonium salts solutions}
C22B23/0415 (With acids or salt solutions except ammonium salts solutions) appears on 421 US grants and 585 published applications in this corpus.
Search patents in C22B- Granted patents
- 421
- Published applications
- 585
- Assignees
- 310
- Inventors
- 1,274
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 10 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 15 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 8 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 1 |
| 2002 | 10 | 6 |
| 2003 | 2 | 3 |
| 2004 | 4 | 6 |
| 2005 | 2 | 6 |
| 2006 | 4 | 7 |
| 2007 | 1 | 6 |
| 2008 | 4 | 12 |
| 2009 | 7 | 10 |
| 2010 | 6 | 16 |
| 2011 | 10 | 17 |
| 2012 | 12 | 7 |
| 2013 | 8 | 9 |
| 2014 | 8 | 11 |
| 2015 | 10 | 25 |
| 2016 | 8 | 16 |
| 2017 | 16 | 8 |
| 2018 | 13 | 15 |
| 2019 | 10 | 6 |
| 2020 | 10 | 20 |
| 2021 | 10 | 22 |
| 2022 | 10 | 31 |
| 2023 | 13 | 66 |
| 2024 | 33 | 86 |
| 2025 | 45 | 103 |
| 2026 | 30 | 70 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integration of carbon sequestration with selective hydrometallurgical recovery of metal values22 Sep 2026US 12,742,226 B2Negative Emissions Materials, Inc.
- Impurity control in lithium-ion battery recycling1 Sep 2026US 12,725,847 B2Bluegrass Infrastructure Partners Holdings, LLC
- Methods for battery-grade aqueous solutions of nickel salts18 Aug 2026US 12,709,552 B2Bluegrass Infrastructure Partners Holdings, LLC
- Methods for preparing cathode active material precursor material and cathode active material for lithium secondary battery, and cathode active material for lithium secondary battery prepared according to same14 Jul 2026US 12,683,207 B2Dongwoo Fine-Chem Co., Ltd.
- Method for removing elemental copper from ternary battery waste and application thereof14 Jul 2026US 12,683,208 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Process for extracting nickel from gasifier slag24 Sep 2026US 2026/0285702 A1Reliance Industries Limited
- Process10 Sep 2026US 2026/0265863 A1Velocys Technologies Limited
- Systems and methods for combined co2 storage and metal extraction from ultramafic rock and mine tailings10 Sep 2026US 2026/0265864 A1The Trustees of Columbia University in the City of New York
- Method of recycling waste ionomer membrane3 Sep 2026US 2026/0258524 A1Johnson Matthey Public Limited Company
- Leaching method for sulfide minerals3 Sep 2026US 2026/0258525 A1Guangxi Cngr New Energy Science & Technology Co., Ltd
Most cited
By later US patents
- Chloride assisted hydrometallurgical copper extraction52US 5,431,788 ACominco Engineering Services Ltd. · 1995
- Recovery of V.sub.2 O.sub.5 and nickel values from petroleum coke45US 4,443,415 AAmax Inc. · 1984
- Chloride assisted hydrometallurgical extraction of metal42US 5,902,474 ACominco Engineering Services Ltd. · 1999
- Metal sulphide extraction36US 4,378,275 ASaudi-Sudanese Red Sea Joint Commission · 1983
- Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt35US 4,304,644 AThe International Nickel Company, Inc. · 1981