C01D 15/06
Sulfates
Official title: Sulfates; Sulfites
C01D15/06 (Sulfates) appears on 63 US grants and 96 published applications in this corpus.
Search patents in C01D- Granted patents
- 63
- Published applications
- 96
- Assignees
- 62
- Inventors
- 219
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 3 |
| 2015 | 2 | 1 |
| 2016 | 2 | 0 |
| 2017 | 1 | 3 |
| 2018 | 1 | 3 |
| 2019 | 1 | 5 |
| 2020 | 6 | 8 |
| 2021 | 4 | 7 |
| 2022 | 6 | 15 |
| 2023 | 7 | 13 |
| 2024 | 15 | 12 |
| 2025 | 8 | 9 |
| 2026 | 4 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Processes for treating aqueous compositions comprising lithium sulfate and sulfuric acid26 May 2026US 12,636,593 B2Nemaska Lithium Inc.
- Process for producing alumina and a lithium salt17 Mar 2026US 12,577,115 B2Tianqi Lithium Kwinana Pty Ltd
- Method for recovering active metal of lithium secondary battery10 Feb 2026US 12,545,974 B2SK Innovation Co., Ltd.
- Method of concentrating lithium-containing solutions and recovering lithium therefrom20 Jan 2026US 12,528,053 B2UT-Battelle, LLC
- Method for producing lithium compound18 Nov 2025US 12,473,201 B2Posco
- Method for producing high purity lithium sulfate from waste saggar17 Sep 2026US 2026/0274698 A1Koreaseparation Co., Ltd.
- Method for the recovery of metals from e-waste10 Sep 2026US 2026/0265859 A1Renewable Metals Pty Ltd
- Systems for treating aqueous compositions comprising lithium sulfate and sulfuric acid3 Sep 2026US 2026/0257146 A1Nemaska Lithium Inc.
- Ion permeable membrane20 Aug 2026US 2026/0242230 A1Idemitsu Kosan Co., Ltd.
- Method for producing lithium sulfide16 Jul 2026US 2026/0200733 A1Solid Ionics Co., Ltd
Most cited
By later US patents
- Processes for preparing lithium hydroxide48US 9,677,181 B2Nemaska Lithium Inc. · 2017
- Process for recovering lithium from salt brines43US 4,723,962 ALithium Corporation of America · 1988
- Method of preparing lithium salts41US 6,555,078 B1FMC Corporation · 2003
- High purity lithium salts and lithium salt solutions40US 6,017,500 AFMC Corporation · 2000
- Process for recovering lithium from brine by salting out lithium sulfate monohydrate36US 4,287,163 ACorporacion De Fomento De La Produccion · 1981