C01F 5/40
Magnesium sulfates
Official title: Magnesium sulfates (double sulfates of magnesium with sodium or potassium C01D5/12, with other alkali metals {C01D15/00}, C01D17/00)
C01F5/40 (Magnesium sulfates) appears on 87 US grants and 86 published applications in this corpus.
Search patents in C01F- Granted patents
- 87
- Published applications
- 86
- Assignees
- 68
- Inventors
- 225
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 3 |
| 2009 | 2 | 1 |
| 2010 | 0 | 4 |
| 2011 | 2 | 3 |
| 2012 | 2 | 1 |
| 2013 | 2 | 1 |
| 2014 | 1 | 5 |
| 2015 | 2 | 2 |
| 2016 | 3 | 3 |
| 2017 | 2 | 10 |
| 2018 | 5 | 10 |
| 2019 | 7 | 5 |
| 2020 | 3 | 2 |
| 2021 | 2 | 3 |
| 2022 | 5 | 9 |
| 2023 | 3 | 5 |
| 2024 | 5 | 9 |
| 2025 | 7 | 5 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing sulphur-containing potash granules18 Aug 2026US 12,709,546 B2K+S Aktiengesellschaft
- Long-term fire retardant with magnesium sulfate and corrosion inhibitors and methods for making and using same19 May 2026US 12,629,555 B2Perimeter Solutions LP
- System and method of generating hydrogen gas24 Feb 2026US 12,559,401 B2Rtx Bbn Technologies, Inc.
- System and method of generating electricity in a body of water14 Oct 2025US 12,441,644 B2Rtx Bbn Technologies, Inc.
- System and method of separating oxygen from a body of water30 Sep 2025US 12,428,328 B2Rtx Bbn Technologies, Inc.
- Method and device for producing particles with a high magnesium content from sea water27 Aug 2026US 2026/0250144 A1
- Systems and methods for producing alkali hydroxides and sulfuric acid or hydrochloric acid11 Jun 2026US 2026/0159405 A1Innovator Energy, LLC
- Recovery system for preparing magnesium sulfate from sulfuric acid waste solution and method thereof12 Mar 2026US 2026/0070801 A1Mg Chem Co., Ltd.
- Systems and methods for producing alkali hydroxides and sulfuric acid or hydrochloric acid24 Jul 2025US 2025/0236531 A1Innovator Energy, LLC
- Inorganic compound with ratio of magnesium chloride to magnesium sulfate of 1:0.6410 Jul 2025US 2025/0222022 A1
Most cited
By later US patents
- Long-term fire retardant with magnesium sulfate and corrosion inhibitors and methods for making and using same21US 11,395,934 B2FRS Group, LLC · 2022
- Long-term fire retardant with corrosion inhibitors and methods for making and using same20US 11,420,084 B2FRS Group, LLC · 2022
- Process for recovering components from pickling acid residue18US 10,526,684 B2CrisolteQ Ltd · 2020
- Method for treating pickling acid residue17US 11,254,585 B2CrisolteQ Ltd · 2022
- Long-term fire retardant with magnesium sulfate and corrosion inhibitors and methods for making and using same17US 11,602,658 B2FRS Group, LLC · 2023