C22B 59/00
Obtaining rare earth metals
C22B59/00 (Obtaining rare earth metals) appears on 567 US grants and 712 published applications in this corpus.
Search patents in C22B- Granted patents
- 567
- Published applications
- 712
- Assignees
- 446
- Inventors
- 1,795
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 12 | 0 |
| 1989 | 5 | 0 |
| 1990 | 13 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 11 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 4 |
| 2003 | 3 | 2 |
| 2004 | 3 | 2 |
| 2005 | 2 | 3 |
| 2006 | 0 | 6 |
| 2007 | 4 | 3 |
| 2008 | 0 | 3 |
| 2009 | 4 | 4 |
| 2010 | 5 | 8 |
| 2011 | 3 | 10 |
| 2012 | 7 | 16 |
| 2013 | 8 | 26 |
| 2014 | 13 | 31 |
| 2015 | 23 | 41 |
| 2016 | 31 | 52 |
| 2017 | 22 | 34 |
| 2018 | 34 | 35 |
| 2019 | 41 | 42 |
| 2020 | 35 | 37 |
| 2021 | 26 | 49 |
| 2022 | 33 | 39 |
| 2023 | 27 | 59 |
| 2024 | 38 | 68 |
| 2025 | 39 | 69 |
| 2026 | 40 | 69 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tetraazadodecane based chelating agents for separation of rare earth elements and method therefor6 Oct 2026US 12,752,219 B2Ustav Organicke Chemie A Biochemie Av Cr, V. V. I.
- Liquefaction process6 Oct 2026US 12,753,353 B1
- Method for recycling iron ore tailing and use thereof25 Aug 2026US 12,716,113 B2Baotou Research Institute of Rare Earths
- Methods for the recovery of rare earth elements11 Aug 2026US 12,703,641 B2Ohio State Innovation Foundation
- Ultrafast flash joule heating synthesis methods and systems for performing same11 Aug 2026US 12,703,891 B2William Marsh Rice University
- Oxime-based adsorbents and methods of use for selective separation of rare earth elements8 Oct 2026US 2026/0307049 A1The Board of Regents of the University of Oklahoma
- Method of recovery of scandium8 Oct 2026US 2026/0308716 A1Nippon Steel Corporation
- Process for using modified dtpa-associated organosilica media for producing individually separated high purity rare earth elements8 Oct 2026US 2026/0308717 A1Wayne State University
- Method for recycling rare earth element24 Sep 2026US 2026/0286467 A1Kabushiki Kaisha Toshiba
- Method for recycling ceramic sintered body17 Sep 2026US 2026/0274670 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Surface-functionalized mesoporous carbon materials255US 9,249,241 B2UT-Battelle, LLC · 2016
- Supercritical fluid extraction80US 5,356,538 AIdaho Research Foundation, Inc. · 1994
- Methods and devices for the separation of radioactive rare earth metal isotopes from their alkaline earth metal precursors59US 5,225,173 AIdaho Research Foundation, Inc. · 1993
- Hydroxamic acid crown ethers58US 5,274,129 AIdaho Research Foundation, Inc. · 1993
- Alloy target, its fabrication, and regeneration processes58US 6,071,323 ATDKCorporation · 2000