C22B 11/021
Recovery of noble metals from waste materials
Official title: {Recovery of noble metals from waste materials}
C22B11/021 (Recovery of noble metals from waste materials) appears on 153 US grants and 136 published applications in this corpus.
Search patents in C22B- Granted patents
- 153
- Published applications
- 136
- Assignees
- 139
- Inventors
- 444
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 7 | 0 |
| 2003 | 3 | 5 |
| 2004 | 4 | 6 |
| 2005 | 1 | 6 |
| 2006 | 2 | 4 |
| 2007 | 1 | 4 |
| 2008 | 2 | 5 |
| 2009 | 1 | 3 |
| 2010 | 5 | 6 |
| 2011 | 1 | 7 |
| 2012 | 7 | 7 |
| 2013 | 6 | 8 |
| 2014 | 3 | 10 |
| 2015 | 8 | 4 |
| 2016 | 7 | 2 |
| 2017 | 2 | 7 |
| 2018 | 2 | 6 |
| 2019 | 9 | 11 |
| 2020 | 6 | 4 |
| 2021 | 1 | 3 |
| 2022 | 4 | 6 |
| 2023 | 3 | 7 |
| 2024 | 6 | 6 |
| 2025 | 4 | 3 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ultrafast flash joule heating synthesis methods and systems for performing same11 Aug 2026US 12,703,891 B2William Marsh Rice University
- Method, apparatus and system for processing a composite waste source26 May 2026US 12,637,737 B2NewSouth Innovations Pty Limited
- Platinum catalyst recycling device with multiple filtration structures14 Apr 2026US 12,599,945 B2Yulin University
- Platinum-group metal recovery method, composition containing platinum-group metals, and ceramic material24 Feb 2026US 12,559,819 B2University of Fukui
- Precious metal catalyst briquettes, process for the manufacture and for the inceneration thereof19 Aug 2025US 12,390,798 B2Heraeus Precious Metal Technology (China) Co., Ltd.
- Method for selectively recovering volatile pt or pd10 Sep 2026US 2026/0265057 A1Yara International Asa
- A method of treating a silicon carbide bearing material25 Jun 2026US 2026/0176714 A1Sibanye Stillwater Limited
- Method for the incineration of waste containing fluorine and noble metals7 May 2026US 2026/0124651 A1Heraeus Precious Metals GmbH & Co. KG
- Volatile and precious metal recovery system made of stacked silver-comprising elements30 Apr 2026US 2026/0117340 A1Yara International Asa
- Method of extracting one or more rare and precious metals from a substrate comprising the same26 Mar 2026US 2026/0085378 A1Helsingin Yliopisto
Most cited
By later US patents
- Process for the manufacture of nitric oxide64US 4,774,069 AJohnson Matthey Public Limited Company · 1988
- Extraction of trace metals from fly ash43US 4,475,993 AThe United States of America as represented by the United States Department of Energy · 1984
- Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material38US 6,401,635 B1Corenso United Oy Ltd. · 2002
- Method for recovering trace elements from coal36US 6,827,837 B22004
- Process for the recovery of platinum group metals from refractory ceramic substrates29US 4,428,768 AJohnson Matthey PLC · 1984