C22B 3/1675
Leaching with a mixture of organic agents wherein one agent at least
Official title: {Leaching with a mixture of organic agents wherein one agent at least is a heterocyclic compounds (C22B3/1683 takes precedence)}
C22B3/1675 (Leaching with a mixture of organic agents wherein one agent at least) appears on 3 US grants and 3 published applications in this corpus.
Search patents in C22B- Granted patents
- 3
- Published applications
- 3
- Assignees
- 8
- Inventors
- 11
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods for selective recovery of rare earth elements and metals from coal ash by ionic liquids24 Mar 2026US 12,584,190 B2Georgia Tech Research Corporation
- Extraction and recovery of gold9 Nov 1993US 5,260,040 ACRA Services Limited
- Obtaining aqueous solution from insoluble metal oxide24 Feb 1987US 4,645,650 ANational Research Development Corporation
- A green process for the extraction of lanthanide elements19 Dec 2024US 2024/0417826 A1Centre National De La Recherche Scientifique
- Methods for Selective Recovery of Rare Earth Elements and Metals from Coal Ash by Ionic Liquids9 Nov 2023US 2023/0357886 A1Georgia Tech Research Corporation
- Extraction of rare earth elements and carbon rich solids from coal feedstock using ionic liquids17 Oct 2019US 2019/0316225 A1Energy, United States Department of
Most cited
By later US patents