C01F 7/473
Removal of organic compounds
Official title: Removal of organic compounds, e.g. sodium oxalate
C01F7/473 (Removal of organic compounds) appears on 65 US grants and 23 published applications in this corpus.
Search patents in C01F- Granted patents
- 65
- Published applications
- 23
- Assignees
- 37
- Inventors
- 134
- Latest grant
- 11 Jun 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 3 |
| 2004 | 2 | 4 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 3 | 3 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 2 | 0 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Bayer process11 Jun 2024US 12,006,225 B2Rio Tinto Alcan International Limited
- Systems and methods for alumina production21 Feb 2023US 11,584,657 B2Solenis Technologies, L.P.
- Cross-linked ethylsulfonated dihydroxypropyl cellulose11 Aug 2015US 9,102,995 B2Nalco Company
- Composition and method for improved aluminum hydroxide production12 Jul 2011US 7,976,821 B2Nalco Company
- Methods and compositions for the removal of impurities and water from the Bayer process5 Jul 2011US 7,972,580 B2Cytec Technology Corp.
- Bayer Process22 Aug 2024US 2024/0279075 A1Rio Tinto AIcan International Limited
- Methods for recovering organic salts from industrial process streams12 Jan 2023US 2023/0011640 A1Cytec Industries Inc.
- Method for impurity control11 Mar 2021US 2021/0070625 A1
- Bayer Process14 Jan 2021US 2021/0009435 A1Rio Tinto Alcan International Limited
- Systems and methods for alumina production30 Jan 2020US 2020/0031683 A1Solenis Technologies, L.P.
Most cited
By later US patents
- Method for the removal of organic substances from alkali metal aluminate solution29US 4,215,094 ASumitomo Aluminum Smelting Company, Ltd. · 1980
- Process for the removal of oxalate and/or sulphate from bayer liquors27US 7,244,404 B2Worsley Alumina Pty. Ltd. · 2007
- Use of surfactants in alumina precipitation in the bayer process25US 4,737,352 ANalco Chemical Company · 1988
- Removal of oxalate from Bayer process liquor21US 4,275,042 AAlcan Research and Development Limited · 1981
- Purification of Bayer process liquors21US 4,578,255 AKaiser Aluminum & Chemical Corporation · 1986