C01G 23/0475
Purification
Official title: {Purification}
C01G23/0475 (Purification) appears on 29 US grants and 37 published applications in this corpus.
Search patents in C01G- Granted patents
- 29
- Published applications
- 37
- Assignees
- 33
- Inventors
- 90
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 2 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 3 | 3 |
| 2017 | 0 | 5 |
| 2018 | 1 | 2 |
| 2019 | 6 | 3 |
| 2020 | 2 | 2 |
| 2021 | 2 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Recycling of components contained in a residue obtained from the chloride process23 Dec 2025US 12,503,374 B2Kronos International, Inc.
- Hydroximic acid-metal hydroxide coordination complex and preparation and application thereof31 Dec 2024US 12,180,236 B2Central South University
- Metallurgical and chemical processes for recovering vanadium and iron values from vanadiferous titanomagnetite and vanadiferous feedstocks16 Mar 2021US 10,947,630 B2Vanadiumcorp Resources Inc.
- Method for preparing transparent free-standing titanium dioxide nanotube array film5 Jan 2021US 10,882,754 B2South China University of Technology
- Method for the purification of alumina27 Oct 2020US 10,815,549 B2AluChem Companies, Inc.
- Recycling of components contained in a residue obtained from the chloride process17 Apr 2025US 2025/0122090 A1Kronos International, Inc.
- Recycling of components contained in a residue obtained from the chloride process28 Dec 2023US 2023/0416107 A1Kronos International, Inc.
- Processing of titaniferous ores and minerals5 Oct 2023US 2023/0312364 A1Fnc Technologies Inc.
- Hydroximic acid-metal hydroxide coordination complex and preparation and application thereof19 Aug 2021US 2021/0253620 A1Central South University
- Metallurgical And Chemical Processes For Recovering Vanadium And Iron Values From Vanadiferous Titanomagnetite And Vanadiferous Feedstocks29 Jul 2021US 2021/0230759 A1Vanadiumcorp Resources Inc.
Most cited
By later US patents
- Process for purifying tantalum oxide and other metal oxides13US 5,707,599 ASantiam Electroactive Materials · 1998
- Processes for preparing alumina and various other products11US 9,382,600 B2Orbite Technologies Inc. · 2016
- Process for concentration of titanium containing anatase ore10US 4,176,159 A1979
- Purification of rutile8US 4,225,564 AUop LLC · 1980
- Method for the preparation of desulfurized titanium oxide hydrolysate of high purity8US 5,527,469 A1996