C22B 34/00
Obtaining refractory metals
C22B34/00 (Obtaining refractory metals) appears on 1,500 US grants and 1,002 published applications in this corpus.
Search patents in C22B- Granted patents
- 1,500
- Published applications
- 1,002
- Assignees
- 800
- Inventors
- 3,158
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 46 | 0 |
| 1977 | 34 | 0 |
| 1978 | 44 | 0 |
| 1979 | 30 | 0 |
| 1980 | 28 | 0 |
| 1981 | 43 | 0 |
| 1982 | 44 | 0 |
| 1983 | 27 | 0 |
| 1984 | 46 | 0 |
| 1985 | 49 | 0 |
| 1986 | 38 | 0 |
| 1987 | 34 | 0 |
| 1988 | 35 | 0 |
| 1989 | 30 | 0 |
| 1990 | 34 | 0 |
| 1991 | 24 | 0 |
| 1992 | 22 | 0 |
| 1993 | 27 | 0 |
| 1994 | 9 | 0 |
| 1995 | 25 | 0 |
| 1996 | 14 | 0 |
| 1997 | 17 | 0 |
| 1998 | 23 | 0 |
| 1999 | 20 | 0 |
| 2000 | 18 | 0 |
| 2001 | 31 | 7 |
| 2002 | 22 | 28 |
| 2003 | 27 | 52 |
| 2004 | 26 | 49 |
| 2005 | 23 | 48 |
| 2006 | 21 | 53 |
| 2007 | 21 | 41 |
| 2008 | 24 | 62 |
| 2009 | 34 | 50 |
| 2010 | 42 | 43 |
| 2011 | 31 | 45 |
| 2012 | 31 | 46 |
| 2013 | 29 | 50 |
| 2014 | 41 | 37 |
| 2015 | 39 | 41 |
| 2016 | 32 | 34 |
| 2017 | 37 | 24 |
| 2018 | 31 | 48 |
| 2019 | 38 | 35 |
| 2020 | 28 | 34 |
| 2021 | 30 | 21 |
| 2022 | 19 | 33 |
| 2023 | 16 | 36 |
| 2024 | 23 | 37 |
| 2025 | 25 | 26 |
| 2026 | 18 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquefaction process6 Oct 2026US 12,753,353 B1
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- 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.
- Mining chemical collector compositions and processes for recovering metal from ore1 Oct 2026US 2026/0295598 A1Chevron Phillips Chemical Company LP
- Producing silica nanoparticles during mineral carbonation1 Oct 2026US 2026/0296902 A1Wisconsin Alumni Research Foundation
- Method for recycling ceramic sintered body17 Sep 2026US 2026/0274670 A1Kabushiki Kaisha Toshiba
- Methods for reducing metal oxides with ammonia gas10 Sep 2026US 2026/0265846 A1Trustees of Tufts College
- Method of management of fly ashes from the combustion of petroleum products27 Aug 2026US 2026/0250488 A1RE-Solve Sp. z.o.o.
Most cited
By later US patents
- Fast quench reactor method295US 5,935,293 ALockheed Martin Idaho Technologies Company · 1999
- Fast quench reactor and method231US 5,749,937 ALockheed Idaho Technologies Company · 1998
- Apparatus for the production or refining of metals, and related processes164US 7,381,366 B2General Electric Company · 2008
- Thermal synthesis apparatus and process128US 6,821,500 B2Bechtel BWXT Idaho, LLC · 2004
- Tantalum powder, method for producing same powder and sintered anodes obtained from it101US 6,193,779 B1H. C. Starck GmbH · 2001