C01B 17/96
Methods for the preparation of sulfates in general
Official title: Methods for the preparation of sulfates in general (particular individual sulfates, see the relevant groups of subclasses C01B - C01G, according to the cation)
C01B17/96 (Methods for the preparation of sulfates in general) appears on 70 US grants and 49 published applications in this corpus.
Search patents in C01B- Granted patents
- 70
- Published applications
- 49
- Assignees
- 50
- Inventors
- 107
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 2 |
| 2004 | 1 | 3 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 2 | 1 |
| 2009 | 1 | 3 |
| 2010 | 2 | 2 |
| 2011 | 2 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 2 |
| 2014 | 3 | 1 |
| 2015 | 1 | 3 |
| 2016 | 1 | 2 |
| 2017 | 3 | 1 |
| 2018 | 2 | 3 |
| 2019 | 3 | 6 |
| 2020 | 6 | 4 |
| 2021 | 5 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 4 |
| 2024 | 0 | 0 |
| 2025 | 3 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Treatment process for crystallizing a metal sulfate14 Oct 2025US 12,441,621 B2Hatch Ltd.
- Process for production of potassium sulfate, ammonium sulfate, and calcium carbonate from syngenite29 Apr 2025US 12,286,358 B2Upcycle Minerals Inc.
- Processes for crystallizing metal sulfates and methods for producing crystallized metal sulfates22 Apr 2025US 12,281,027 B2
- Method of treating fly ash of a recovery boiler15 Aug 2023US 11,725,341 B2Andritz Inc.
- Stable electrolyte material and solvent material containing same10 Jan 2023US 11,547,129 B2Tygrus, LLC
- Processes and methods for production of crystallized metal sulfates16 Apr 2026US 2026/0103396 A1Hatch Ltd.
- Treatment process for crystallizing a metal sulfate12 Mar 2026US 2026/0070803 A1Hatch Ltd.
- Process for the production of potassium sulphate based fertilizers14 Sep 2023US 2023/0286874 A1Desmet Ballestra S.P.A.
- Dynamic covalent polymerizations with elemental sulfur and sulfur prepolymers23 Mar 2023US 2023/0089692 A1Arizona Board of Regents on Behalf of the University of Arizona
- Processes and methods for production of crystallized metal sulfates16 Feb 2023US 2023/0048939 A1Hatch Ltd.
Most cited
By later US patents
- Synthesis method for carbon material based on LiMPO444US 7,457,018 B2Hydro-Quebec · 2008
- Synthesis method for carbon material based on LixM1-yM'(XO4)n40US 7,285,260 B2Cnrs · 2007
- Sulfur composites and polymeric materials from elemental sulfur29US 9,567,439 B1Arizona Board of Regents on Behalf of the University of Arizona · 2017
- Method for synthesis of carbon-coated redox materials with controlled size22US 7,601,318 B2Cnrs · 2009
- Metal and fluorine values recovery from mineral ore treatment20US 5,531,970 AAdvanced Recovery Systems, Inc. · 1996