C22B 11/08
Obtaining noble metals: by cyaniding
Official title: by cyaniding
C22B11/08 (Obtaining noble metals: by cyaniding) appears on 245 US grants and 142 published applications in this corpus.
Search patents in C22B- Granted patents
- 245
- Published applications
- 142
- Assignees
- 159
- Inventors
- 484
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 9 | 0 |
| 1991 | 14 | 0 |
| 1992 | 7 | 0 |
| 1993 | 15 | 0 |
| 1994 | 11 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 11 | 4 |
| 2003 | 2 | 8 |
| 2004 | 3 | 5 |
| 2005 | 3 | 7 |
| 2006 | 2 | 1 |
| 2007 | 5 | 7 |
| 2008 | 3 | 12 |
| 2009 | 6 | 18 |
| 2010 | 3 | 3 |
| 2011 | 10 | 2 |
| 2012 | 5 | 3 |
| 2013 | 2 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 3 | 9 |
| 2017 | 1 | 6 |
| 2018 | 5 | 5 |
| 2019 | 3 | 1 |
| 2020 | 5 | 6 |
| 2021 | 4 | 4 |
| 2022 | 5 | 8 |
| 2023 | 2 | 13 |
| 2024 | 2 | 4 |
| 2025 | 4 | 9 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for removing cyanide from a cyanide-bearing aqueous fluid21 Apr 2026US 12,606,462 B2Commonwealth Scientific and Industrial Research Organisation
- Using synthetic lixiviant biology for the recovery of precious and toxic metals from anthropogenic sources24 Mar 2026US 12,584,191 B2National University of Singapore
- Sulphide oxidation in leaching of minerals17 Feb 2026US 12,553,106 B2Glencore Technology Pty Limited
- Process for removing micropollutants in liquid or gas23 Sep 2025US 12,420,289 B2Radma Carbon AB
- Compositions and methods for improved precious metal extraction from ore8 Jul 2025US 12,351,888 B2Solugen, Inc.
- Process for recovering platinum-group metal from waste catalyst by using biocyanide and ionic liquid8 Oct 2026US 2026/0308713 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
- Methods of extracting platinum group metals18 Jun 2026US 2026/0168050 A1National University of Singapore
- Method of converting copper cyanide to copper oxide and system thereof11 Jun 2026US 2026/0159409 A1Cyanco Corporation
- Environmentally-friendly surfactants for mineral beneficiation11 Dec 2025US 2025/0375776 A1Colonial Chemical Inc.
- Electronic waste composite article or material and process for making same24 Jul 2025US 2025/0236928 A1Excir Works Corp.
Most cited
By later US patents
- Process for the recovery of gold from refractory ores by pressure oxidation70US 4,552,589 AGetty Oil Company · 1985
- Apparatus for enhancing chemical reactions69US 4,168,295 A1979
- Process for the recovery of gold from carbonaceous ores66US 4,289,532 AFreeport Minerals Corporation · 1981
- Leaching agglomerated gold - silver ores64US 4,256,706 AThe United States of America as represented by the Secretary of the Interior · 1981
- Process for recovery of gold from refractory ores60US 5,071,477 AAmerican Barrick Resources Corporation of Toronto · 1991