C22B 41/00
Obtaining germanium
Official title: Obtaining germanium {(treatment or purification of solutions by adsorption on solids C22B3/24, by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42)}
C22B41/00 (Obtaining germanium) appears on 33 US grants and 17 published applications in this corpus.
Search patents in C22B- Granted patents
- 33
- Published applications
- 17
- Assignees
- 28
- Inventors
- 110
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
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| 1987 | 2 | 0 |
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| 1991 | 2 | 0 |
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| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
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| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 2 |
| 2019 | 2 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 2 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Liquefaction process6 Oct 2026US 12,753,353 B1
- Comprehensive utilization method of beneficiation-metallurgy-chemical combination for germanium-rich lignite14 Apr 2026US 12,601,032 B1Central South University
- Method for co-producing blister copper by enriching germanium and indium from a copper sulfide ore7 Oct 2025US 12,435,388 B2Honghe University
- Method for extracting germanium based on acid decomposition25 Mar 2025US 12,258,651 B2Kunming Metallurgical Research Institute Co., Ltd.
- System and method for producing critical minerals9 Jul 2024US 12,031,195 B2Microbeam Technologies, Inc.
- Method for extracting germanium based on acid decomposition16 Jan 2025US 2025/0019795 A1Kunming Metallurgical Research Institute Co., Ltd.
- Method for recovering germanium17 Oct 2024US 2024/0344177 A1
- Method for co-producing blister copper by enriching germanium and indium from a copper sulfide ore4 Apr 2024US 2024/0110259 A1Honghe University
- System and method for producing critical minerals26 Jan 2023US 2023/0024705 A1Microbeam Technologies, Inc.
- Method for preparing silicon and/or germanium nanowires14 Feb 2019US 2019/0047870 A1Commissariat A L' Energie Atomique
Most cited
By later US patents
- Magnetoplasmadynamic apparatus and process for the separation and deposition of materials173US 4,471,003 A1984
- Magnetoplasmadynamic apparatus for the separation and deposition of materials104US 4,487,162 A1984
- Narrow size distribution silicon and germanium nanocrystals84US 6,268,041 B1Starfire Electronic Development & Marketing, Ltd. · 2001
- Method for photolytic liquid phase synthesis of silicon and germanium nanocrystalline materials39US 5,850,064 AStarfire Electronics Development & Marketing, Ltd. · 1998
- Biodegradation and recovery of gallium and other metals from integrated circuits17US 5,030,425 ATechnical Research, Inc. · 1991