C22B 34/24
Obtaining niobium or tantalum
C22B34/24 (Obtaining niobium or tantalum) appears on 177 US grants and 139 published applications in this corpus.
Search patents in C22B- Granted patents
- 177
- Published applications
- 139
- Assignees
- 119
- Inventors
- 414
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 1 |
| 2002 | 3 | 8 |
| 2003 | 10 | 12 |
| 2004 | 5 | 4 |
| 2005 | 8 | 13 |
| 2006 | 4 | 8 |
| 2007 | 4 | 2 |
| 2008 | 5 | 9 |
| 2009 | 3 | 4 |
| 2010 | 4 | 2 |
| 2011 | 3 | 13 |
| 2012 | 2 | 4 |
| 2013 | 2 | 4 |
| 2014 | 3 | 2 |
| 2015 | 7 | 5 |
| 2016 | 6 | 6 |
| 2017 | 9 | 2 |
| 2018 | 2 | 8 |
| 2019 | 4 | 6 |
| 2020 | 6 | 5 |
| 2021 | 2 | 1 |
| 2022 | 2 | 2 |
| 2023 | 4 | 5 |
| 2024 | 2 | 5 |
| 2025 | 7 | 7 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing tantalum powder for capacitors by reducing tantalum oxide with alkaline earth metal15 Sep 2026US 12,734,580 B2Ningxia Orient Tantalum Industry Co., Ltd.
- Method for producing tantalum powder and tantalum powder obtained by the method28 Jul 2026US 12,691,494 B2Ningxia Orient Tantalum Industry Co., Ltd.
- Recycling of components contained in a residue obtained from the chloride process23 Dec 2025US 12,503,374 B2Kronos International, Inc.
- Tantalum based alloy that is resistant to aqueous corrosion30 Sep 2025US 12,428,708 B2Materion Newton Inc.
- Method of extracting lithium from spodumene and meanwhile recovering low iron and low sulfur silicon aluminum micro-powder, high purity gypsum, tantalum niobium concentrate and lithium rich iron material23 Sep 2025US 12,421,571 B2Tianqi Lithium Corporation
- Process for extracting tantalum and niobium from an aqueous acidic solution8 Jan 2026US 2026/0009106 A1Centre National De La Recherche Scientifique
- Metal compound, metal recovery electrode, and method for recovering metals from spent electrodes30 Oct 2025US 2025/0333870 A1Institut National De La Recherche Scientifique
- Methods for recovering a target metal from iron or steel slag using at least one of a carbothermic reduction process and a pyro-hydrometallurgical process2 Oct 2025US 2025/0305086 A1Tenova Goodfellow Inc.
- Method for metal production28 Aug 2025US 2025/0270671 A1Bradford Metallurgy Ltd
- Recovering rare earth elements8 May 2025US 2025/0146104 A1The Australian National University
Most cited
By later US patents
- Method for deoxidizing tantalum material93US 4,722,756 ACabot Corporation · 1988
- Niobium powder and a process for the production of niobium and/or tantalum powders87US 6,136,062 AH. C. Starck GmbH · 2000
- Method for producing tantallum/niobium metal powders by the reduction of their oxides with gaseous magnesium86US 6,171,363 B2H. C. Starck GmbH · 2001
- Method of making powders and products of tantalum and niobium74US 5,242,481 ACabot Corporation · 1993
- Process for producing tantalum and columbium powder72US 4,149,876 AFansteel Inc. · 1979