C22B 34/225
From spent catalysts
Official title: {from spent catalysts}
C22B34/225 (From spent catalysts) appears on 59 US grants and 47 published applications in this corpus.
Search patents in C22B- Granted patents
- 59
- Published applications
- 47
- Assignees
- 45
- Inventors
- 140
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 5 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 4 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 2 | 7 |
| 2010 | 4 | 3 |
| 2011 | 0 | 3 |
| 2012 | 4 | 3 |
| 2013 | 1 | 4 |
| 2014 | 5 | 3 |
| 2015 | 4 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 2 |
| 2019 | 3 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 2 |
| 2022 | 0 | 1 |
| 2023 | 2 | 4 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Metals recovery from spent catalyst11 Aug 2026US 12,703,892 B2Chevron U.S.A.Inc.
- Metals recovery from spent supported catalyst17 Mar 2026US 12,577,125 B2Chevron U.S.A.Inc.
- Process for the selective recovery of transition metals from organic residues19 Aug 2025US 12,392,011 B2ENI S. p. A.
- Method for selective recovery of valuable metal from waste denitrification catalyst through alkali fusion16 Jul 2024US 12,037,659 B2Korea Institute of Geoscience and Mineral Resources
- Selective recovery method of vanadium and cesium from waste sulfuric acid vanadium catalyst, and high-quality vanadium aqueous solution and cesium alum produced thereby7 Nov 2023US 11,807,544 B2Korea Institute of Geoscience and Mineral Resources
- Method for recovering valuable metals from spent catalysts7 Nov 2024US 2024/0368733 A1
- Processes for recycling spent catalysts, recycling rechargeable batteries, and integrated processes thereof21 Dec 2023US 2023/0411723 A1Aleon Renewable Metals, LLC.
- Metals recovery from spent supported catalyst17 Aug 2023US 2023/0257280 A1Chevron U.S.A.Inc.
- Metals recovery from spent catalyst25 May 2023US 2023/0160037 A1
- Selective recovery method of vanadium and cesium from waste sulfuric acid vanadium catalyst, and high-quality vanadium aqueous solution and cesium alum produced thereby4 May 2023US 2023/0138828 A1Korea Institute of Geoscience and Mineral Resources
Most cited
By later US patents
- Colloidal particles used in sensing arrays63US 6,537,498 B1California Institute of Technology · 2003
- Metal recovery from hydroconverted heavy effluent32US 8,636,967 B2Intevep, S. A. · 2014
- Recovery of metal values from spent catalysts30US 4,721,606 AUnion Oil Company of California · 1988
- Process for extracting metals from spent desulphurization catalysts26US 4,087,510 AAkzona Incorporated · 1978
- Method of separately recovering metal values of petroleum refining catalyst26US 4,861,565 AThe Hall Chemical Company · 1989