C22B 11/04
Obtaining noble metals: by wet processes
Official title: {by wet processes (extraction of metal compounds by leaching in organic solutions C22B3/16; treatment or purification of solutions by liquid-liquid extraction C22B3/26)}
C22B11/04 (Obtaining noble metals: by wet processes) appears on 1,051 US grants and 888 published applications in this corpus.
Search patents in C22B- Granted patents
- 1,051
- Published applications
- 888
- Assignees
- 729
- Inventors
- 2,516
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 11 | 0 |
| 1978 | 24 | 0 |
| 1979 | 9 | 0 |
| 1980 | 10 | 0 |
| 1981 | 13 | 0 |
| 1982 | 15 | 0 |
| 1983 | 20 | 0 |
| 1984 | 13 | 0 |
| 1985 | 12 | 0 |
| 1986 | 20 | 0 |
| 1987 | 23 | 0 |
| 1988 | 20 | 0 |
| 1989 | 16 | 0 |
| 1990 | 17 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 21 | 0 |
| 1994 | 28 | 0 |
| 1995 | 24 | 0 |
| 1996 | 15 | 0 |
| 1997 | 20 | 0 |
| 1998 | 22 | 0 |
| 1999 | 23 | 0 |
| 2000 | 20 | 0 |
| 2001 | 19 | 7 |
| 2002 | 24 | 15 |
| 2003 | 18 | 31 |
| 2004 | 18 | 29 |
| 2005 | 13 | 28 |
| 2006 | 16 | 22 |
| 2007 | 15 | 28 |
| 2008 | 10 | 27 |
| 2009 | 20 | 46 |
| 2010 | 28 | 34 |
| 2011 | 26 | 24 |
| 2012 | 19 | 28 |
| 2013 | 22 | 29 |
| 2014 | 16 | 37 |
| 2015 | 29 | 48 |
| 2016 | 27 | 60 |
| 2017 | 40 | 38 |
| 2018 | 34 | 36 |
| 2019 | 41 | 38 |
| 2020 | 29 | 29 |
| 2021 | 21 | 36 |
| 2022 | 27 | 39 |
| 2023 | 30 | 47 |
| 2024 | 21 | 53 |
| 2025 | 21 | 48 |
| 2026 | 21 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Gas-Assisted Microflow Extraction (GAME) system patent6 Oct 2026US 12,753,463 B2Phinix, LLC
- Integrated recovery of metals from complex substrates22 Sep 2026US 12,742,224 B2Yava International Inc.
- Method for recovering noble metals from catalytic converter15 Sep 2026US 12,735,768 B2National Ilan University
- Method for recovering metal from metal element-containing substance1 Sep 2026US 12,723,291 B2IHI Corporation
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, 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)
- Pincer-type diphenyl sulfide compound, and preparation method and use thereof1 Oct 2026US 2026/0297025 A1Hunan Institute of Science and Technology
- Hydrometallurgical Process for Recovering Palladium from a Spent Catalyst24 Sep 2026US 2026/0286463 A1Peroxidos Do Brasil Ltda
- Method for producing palladium from ag slime17 Sep 2026US 2026/0275453 A1Korea Zinc Co., Ltd.
- A method of refining and recycling iridium10 Sep 2026US 2026/0265079 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- Process and apparatus for generating bromine68US 5,679,239 AElectrocatalytic, Inc. · 1997
- Recovery of precious metals from metal sulphides66US 4,070,182 ASherritt Gordon Mines Limited · 1978
- Metal value recovery from metal sulfide containing ores66US 4,740,243 AEnsci, Inc. · 1988
- Recovery of precious metals from a thiourea leach61US 4,778,519 A1988
- Inorganic perbromide compositions and methods of use thereof61US 5,607,619 AGreat Lakes Chemical Corporation · 1997