C22B 11/042
Recovery of noble metals from waste materials
Official title: {Recovery of noble metals from waste materials}
C22B11/042 (Recovery of noble metals from waste materials) appears on 394 US grants and 428 published applications in this corpus.
Search patents in C22B- Granted patents
- 394
- Published applications
- 428
- Assignees
- 321
- Inventors
- 1,174
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 4 |
| 2002 | 10 | 9 |
| 2003 | 10 | 18 |
| 2004 | 11 | 17 |
| 2005 | 5 | 11 |
| 2006 | 10 | 8 |
| 2007 | 10 | 12 |
| 2008 | 6 | 14 |
| 2009 | 7 | 21 |
| 2010 | 13 | 14 |
| 2011 | 9 | 13 |
| 2012 | 9 | 13 |
| 2013 | 9 | 12 |
| 2014 | 6 | 15 |
| 2015 | 15 | 13 |
| 2016 | 10 | 22 |
| 2017 | 18 | 18 |
| 2018 | 10 | 14 |
| 2019 | 19 | 19 |
| 2020 | 12 | 18 |
| 2021 | 3 | 23 |
| 2022 | 15 | 21 |
| 2023 | 15 | 26 |
| 2024 | 13 | 27 |
| 2025 | 16 | 28 |
| 2026 | 11 | 18 |
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 and system for supercritical fluid extraction of metal23 Jun 2026US 12,662,390 B2The Governing Council of the University of Toronto
- Method for recycling silver from waste IC chips using soluble starch23 Jun 2026US 12,662,717 B2Nanjing University
- 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
- A method of refining and recycling iridium10 Sep 2026US 2026/0265079 A1Johnson Matthey Public Limited Company
- Recycling of catalyst coated membranes10 Sep 2026US 2026/0265860 A1
Most cited
By later US patents
- Recovery of precious metals from a thiourea leach61US 4,778,519 A1988
- Aqueous solutions for obtaining metals by reductive deposition60US 6,183,545 B2Daiwa Fine Chemicals Co., Ltd. · 2001
- Recovery of gold, silver and platinum group metals with various leachants at low pulp densities46US 5,215,575 A1993
- Silver and manganese recovery using acidified thiourea38US 4,816,235 A1989
- Recovery of precious metal and other values from spent compositions/materials36US 6,455,018 B1Rhone-Poulenc Chimie · 2002