C22B 34/14
Obtaining zirconium or hafnium
Official title: Obtaining zirconium or hafnium {(treatment or purification of solutions by liquid-liquid extraction, by ion exchange or by adsorption C22B3/00, C01G25/003, C01G27/003)}
C22B34/14 (Obtaining zirconium or hafnium) appears on 154 US grants and 69 published applications in this corpus.
Search patents in C22B- Granted patents
- 154
- Published applications
- 69
- Assignees
- 96
- Inventors
- 323
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 9 | 0 |
| 1989 | 11 | 0 |
| 1990 | 7 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 5 |
| 2004 | 3 | 1 |
| 2005 | 2 | 2 |
| 2006 | 3 | 4 |
| 2007 | 2 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 3 | 2 |
| 2011 | 2 | 2 |
| 2012 | 1 | 2 |
| 2013 | 2 | 3 |
| 2014 | 2 | 4 |
| 2015 | 3 | 5 |
| 2016 | 7 | 5 |
| 2017 | 3 | 1 |
| 2018 | 5 | 7 |
| 2019 | 2 | 3 |
| 2020 | 2 | 4 |
| 2021 | 2 | 1 |
| 2022 | 3 | 6 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 4 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for recovering hafnium and impurity metals from hafnium-containing waste residue14 Jul 2026US 12,680,145 B2Jiangxi Zhongha New Material Co., Ltd.
- Method for synthesizing zirconium complex21 Apr 2026US 12,606,575 B2JFE Engineering Corporation
- Method for synthesizing zirconium complex8 Jul 2025US 12,351,890 B2JFE Engineering Corporation
- System and process for the recovery of titanium, titanium alloy, zirconium and zirconium alloy scrap18 Mar 2025US 12,252,761 B2
- System and process for the recovery of titanium, titanium alloy, zirconium and zirconium alloy scrap18 Jun 2024US 12,012,645 B2
- Method for metal production28 Aug 2025US 2025/0270671 A1Bradford Metallurgy Ltd
- Metal extractant and separation recovery method of metal ions using metal extractant31 Jul 2025US 2025/0243560 A1FUJIFILM Corporation
- Recovering rare earth elements8 May 2025US 2025/0146104 A1The Australian National University
- Method for recovering hafnium and impurity metals from hafnium-containing waste residue13 Mar 2025US 2025/0084504 A1Shenzhen Sinohf Technology Co., Ltd.
- Apparatus and method for metal extraction8 Feb 2024US 2024/0043963 A1USA Rare Earth, LLC
Most cited
By later US patents
- Process for obtaining silicon from fluosilicic acid59US 4,442,082 ASRI International · 1984
- 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
- Production of metal powders by reduction of metal salts in fused bath40US 4,820,339 ACerex Corporation · 1989
- Deoxidation of a refractory metal35US 5,022,935 ARMI Titanium Company · 1991