C22B 34/36
Obtaining tungsten
C22B34/36 (Obtaining tungsten) appears on 130 US grants and 72 published applications in this corpus.
Search patents in C22B- Granted patents
- 130
- Published applications
- 72
- Assignees
- 76
- Inventors
- 280
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 13 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 9 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 2 |
| 2011 | 2 | 4 |
| 2012 | 2 | 4 |
| 2013 | 3 | 5 |
| 2014 | 5 | 4 |
| 2015 | 2 | 3 |
| 2016 | 5 | 3 |
| 2017 | 1 | 5 |
| 2018 | 3 | 4 |
| 2019 | 6 | 1 |
| 2020 | 3 | 5 |
| 2021 | 1 | 2 |
| 2022 | 3 | 4 |
| 2023 | 3 | 6 |
| 2024 | 2 | 4 |
| 2025 | 2 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Metals recovery from spent catalyst11 Aug 2026US 12,703,892 B2Chevron U.S.A.Inc.
- Metals recovery from spent supported catalyst17 Mar 2026US 12,577,125 B2Chevron U.S.A.Inc.
- Method for extracting a refractory metal from an ore, a concentrate or a waste product8 Apr 2025US 12,270,089 B2Ecole Nationale Superieure de Chimie de Paris
- Low temperature reduction of metal oxides4 Mar 2025US 12,241,141 B2Kinaltek Pty. Ltd.
- Process for oxidative cleavage of vegetable oils containing monosaturated fatty acid triglycerides30 Jul 2024US 12,049,682 B2Novamont S. p. A.
- 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
- Low temperature reduction of metal oxides5 Jun 2025US 2025/0179609 A1Kinaltek Pty. Ltd.
- Device Comprising a Reaction Container for Solids Reactions19 Dec 2024US 2024/0416308 A1H. C. Starck Tungsten GmbH
- Recycling of smart windows22 Feb 2024US 2024/0058849 A1Polyceed Inc.
Most cited
By later US patents
- Oxidation process for releasing metal values in which nitric acid is regenerated in situ28US 4,834,793 AHydrochem Developments Ltd. · 1989
- Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material27US 4,624,703 AGTE Products Corporation · 1986
- Recovery of tungsten from heavy metal alloys26US 4,338,126 AGTE Products Corporation · 1982
- Method of separately recovering metal values of petroleum refining catalyst26US 4,861,565 AThe Hall Chemical Company · 1989
- Retrieval of high value refractory metals from alloys and mixtures24US 9,322,081 B2Orchard Material Technology, LLC · 2016