C22B 34/30
Obtaining chromium, molybdenum or tungsten
C22B34/30 (Obtaining chromium, molybdenum or tungsten) appears on 518 US grants and 311 published applications in this corpus.
Search patents in C22B- Granted patents
- 518
- Published applications
- 311
- Assignees
- 323
- Inventors
- 1,148
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 16 | 0 |
| 1978 | 12 | 0 |
| 1979 | 10 | 0 |
| 1980 | 10 | 0 |
| 1981 | 16 | 0 |
| 1982 | 27 | 0 |
| 1983 | 17 | 0 |
| 1984 | 20 | 0 |
| 1985 | 20 | 0 |
| 1986 | 21 | 0 |
| 1987 | 12 | 0 |
| 1988 | 13 | 0 |
| 1989 | 9 | 0 |
| 1990 | 13 | 0 |
| 1991 | 7 | 0 |
| 1992 | 11 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 4 |
| 2003 | 6 | 10 |
| 2004 | 5 | 10 |
| 2005 | 1 | 4 |
| 2006 | 3 | 9 |
| 2007 | 7 | 11 |
| 2008 | 3 | 11 |
| 2009 | 6 | 13 |
| 2010 | 14 | 18 |
| 2011 | 5 | 17 |
| 2012 | 14 | 19 |
| 2013 | 13 | 19 |
| 2014 | 10 | 16 |
| 2015 | 15 | 17 |
| 2016 | 14 | 16 |
| 2017 | 11 | 10 |
| 2018 | 13 | 11 |
| 2019 | 15 | 13 |
| 2020 | 13 | 11 |
| 2021 | 11 | 7 |
| 2022 | 7 | 14 |
| 2023 | 6 | 16 |
| 2024 | 11 | 14 |
| 2025 | 10 | 12 |
| 2026 | 10 | 8 |
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
- Metals recovery from spent catalyst11 Aug 2026US 12,703,892 B2Chevron U.S.A.Inc.
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Method for producing copper metal from copper concentrates without generating waste26 May 2026US 12,637,738 B2Universidad De Concepcion
- Mining chemical collector compositions and processes for recovering metal from ore1 Oct 2026US 2026/0295598 A1Chevron Phillips Chemical Company LP
- Methods for reducing metal oxides with ammonia gas10 Sep 2026US 2026/0265846 A1Trustees of Tufts College
- Tungsten powder manufacturing method, and tungsten carbide product manufacturing method20 Aug 2026US 2026/0241454 A1KYOCERA Corporation
- A process for transition metal oxide reduction30 Jul 2026US 2026/0218323 A1Helios Project Ltd.
- Complex Multi-Component Alloy of Iron, Silicon and Chromium18 Jun 2026US 2026/0167504 A1Re Alloys sp. z.o.o
Most cited
By later US patents
- Vertical shaft melting furnace and method of melting65US 4,877,449 AInstitute of Gas Technology · 1989
- Method for induction melting reactive metals and alloys54US 4,738,713 AThe Duriron Company, Inc. · 1988
- Deoxidation of titanium and similar metals using a deoxidant in a molten metal carrier51US 4,923,531 ARMI Corporation · 1990
- Process for recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum48US 4,145,397 AFuji Fine Chemical Co. Ltd. · 1979
- Process for producing high-purity metal targets for LSI electrodes38US 4,619,695 ANihon Kogyo Kabushiki Kaisha · 1986