C22B 34/20
Obtaining niobium, tantalum or vanadium
C22B34/20 (Obtaining niobium, tantalum or vanadium) appears on 390 US grants and 259 published applications in this corpus.
Search patents in C22B- Granted patents
- 390
- Published applications
- 259
- Assignees
- 276
- Inventors
- 926
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 12 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 18 | 0 |
| 1985 | 18 | 0 |
| 1986 | 8 | 0 |
| 1987 | 16 | 0 |
| 1988 | 11 | 0 |
| 1989 | 9 | 0 |
| 1990 | 11 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 15 | 1 |
| 2002 | 4 | 11 |
| 2003 | 13 | 17 |
| 2004 | 5 | 8 |
| 2005 | 8 | 16 |
| 2006 | 6 | 11 |
| 2007 | 7 | 3 |
| 2008 | 7 | 10 |
| 2009 | 7 | 11 |
| 2010 | 8 | 6 |
| 2011 | 4 | 17 |
| 2012 | 8 | 8 |
| 2013 | 4 | 11 |
| 2014 | 8 | 6 |
| 2015 | 13 | 10 |
| 2016 | 7 | 9 |
| 2017 | 13 | 6 |
| 2018 | 6 | 18 |
| 2019 | 11 | 8 |
| 2020 | 8 | 13 |
| 2021 | 9 | 8 |
| 2022 | 5 | 8 |
| 2023 | 7 | 14 |
| 2024 | 7 | 11 |
| 2025 | 11 | 12 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- Vanadium oxide extraction from Bayer process18 Aug 2026US 12,709,550 B2Snf Group
- Metals recovery from spent catalyst11 Aug 2026US 12,703,892 B2Chevron U.S.A.Inc.
- Method for producing tantalum powder and tantalum powder obtained by the method28 Jul 2026US 12,691,494 B2Ningxia Orient Tantalum Industry Co., Ltd.
- Metals recovery from spent supported catalyst17 Mar 2026US 12,577,125 B2Chevron U.S.A.Inc.
- Method of management of fly ashes from the combustion of petroleum products27 Aug 2026US 2026/0250488 A1RE-Solve Sp. z.o.o.
- A process for transition metal oxide reduction30 Jul 2026US 2026/0218323 A1Helios Project Ltd.
- Process of providing titanium dioxide and/or vanadium oxide26 Mar 2026US 2026/0085382 A1Fodere Titanium Limited
- Selective extraction and separation of vanadium and iron26 Feb 2026US 2026/0055005 A1Tcm Research Ltd.
- Process for extracting tantalum and niobium from an aqueous acidic solution8 Jan 2026US 2026/0009106 A1Centre National De La Recherche Scientifique
Most cited
By later US patents
- Tantalum powder, method for producing same powder and sintered anodes obtained from it101US 6,193,779 B1H. C. Starck GmbH · 2001
- 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