C22B 3/46
By substitution
Official title: by substitution, e.g. by cementation
C22B3/46 (By substitution) appears on 175 US grants and 133 published applications in this corpus.
Search patents in C22B- Granted patents
- 175
- Published applications
- 133
- Assignees
- 142
- Inventors
- 436
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 1 |
| 2003 | 3 | 6 |
| 2004 | 7 | 1 |
| 2005 | 4 | 4 |
| 2006 | 4 | 5 |
| 2007 | 1 | 3 |
| 2008 | 1 | 7 |
| 2009 | 3 | 4 |
| 2010 | 3 | 7 |
| 2011 | 10 | 6 |
| 2012 | 1 | 1 |
| 2013 | 4 | 2 |
| 2014 | 2 | 3 |
| 2015 | 0 | 10 |
| 2016 | 7 | 12 |
| 2017 | 3 | 4 |
| 2018 | 10 | 4 |
| 2019 | 9 | 0 |
| 2020 | 1 | 7 |
| 2021 | 1 | 5 |
| 2022 | 4 | 6 |
| 2023 | 5 | 12 |
| 2024 | 4 | 12 |
| 2025 | 6 | 10 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for treating sulfide1 Sep 2026US 12,723,290 B2Sumitomo Metal Mining Co., Ltd.
- Process with low environmental impact and reduced energy consumption for the recovery of lead from the electrode pastes of end-of-life batteries21 Jul 2026US 12,689,074 B2Metallon Clean Extractions B.V.
- Method for recovering metal zinc from solid metallurgical wastes19 May 2026US 12,630,900 B2Engitec Technologies S.P.A.
- Ammonium complex system-based method for separating and purifying lead, zinc, cadmium, and copper31 Mar 2026US 12,590,352 B2GreenNovo Environmental Technology Co., Ltd
- Process and its products for spent lithium-ion batteries treatment31 Mar 2026US 12,592,423 B2Tsinghua University
- Battery recycling by treatment of the leach with metallic nickel21 May 2026US 2026/0139344 A1BASF SE
- Intensified sequential recovery of rare earth elements and other critical metals from waste6 Nov 2025US 2025/0340967 A1Georgia Tech Research Corporation
- Metal-dissolving apparatus, processes, and uses thereof24 Jul 2025US 2025/0236927 A1Hatch Ltd.
- Method for recovering noble metals from catalytic converter3 Jul 2025US 2025/0215526 A1National Ilan University
- Method and apparatus for recovering rare earth metals from scrap containing rare earth metal3 Jul 2025US 2025/0215528 A1Hyundai Motor Company
Most cited
By later US patents
- Simultaneous leaching and cementation of precious metals40US 4,384,889 AFreeport Research & Development Company · 1983
- Effluent treatment39US 4,622,149 AInco Limited · 1986
- Metal sulphide extraction36US 4,378,275 ASaudi-Sudanese Red Sea Joint Commission · 1983
- Recovery of precious metals from evaporite sediments33US 5,405,430 A1995
- Iron powder and sand filtration process for treatment of water contaminated with heavy metals and organic compounds30US 6,942,807 B1The Trustees of the Stevens Institute of Technology · 2005