C01C 1/244
Preparation by double decomposition of ammonium salts with sulfates
C01C1/244 (Preparation by double decomposition of ammonium salts with sulfates) appears on 21 US grants and 12 published applications in this corpus.
Search patents in C01C- Granted patents
- 21
- Published applications
- 12
- Assignees
- 13
- Inventors
- 39
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 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 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 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 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods to treat flue gas desulfurization and metal-bearing waste streams to recover value-added materials16 Jun 2026US 12,655,030 B2Davy Powersports Inc.
- Systems and methods to recover value-added materials from gypsum27 Feb 2024US 11,912,582 B2Davy Powersports Inc.
- Systems and methods to recover value-added materials from gypsum25 Oct 2022US 11,479,472 B2Elixsys, Inc.
- Systems and methods to treat flue gas desulfurization waste to produce ammonium sulfate and calcium carbonate products19 Oct 2021US 11,148,956 B2Elixsys, Inc.
- Method for producing nickel powder6 Nov 2018US 10,118,224 B2Kochi University, National University Corporation
- Systems and methods to treat flue gas desulfurization and metal-bearing waste streams to recover value-added materials17 Sep 2026US 2026/0274697 A1Davy Powersports Inc.
- Systems and processes for producing ammonium sulfate from waste streams13 Jun 2024US 2024/0190713 A1Marsulex Environmental Technologies Corporation
- Systems and Methods to Recover Value-Added Materials from Gypsum13 Jun 2024US 2024/0190716 A1Davy Powersports Inc.
- Method For Manufacturing Ammonium Sulphate And Calcium Carbonate From Phosphogypsum28 Sep 2023US 2023/0303400 A1Ocp SA
- Systems and Methods to Recover Value-Added Materials from Gypsum9 Feb 2023US 2023/0045286 A1Elixsys, Inc.
Most cited
By later US patents
- Method of treating spent potliner material from aluminum reduction cells32US 5,723,097 AGoldendale Aluminum Company · 1998
- Method of treating spent potliner material from aluminum reduction cells22US 5,955,042 AGoldendale Aluminum Company · 1999
- Process for removing hydrogen sulfide and ammonia from gaseous streams13US 4,192,854 AEiC Corporation · 1980
- Method for sodium carbonate compound recovery and formation of ammonium sulfate7US 5,654,351 AOrmiston Mining and Smelting Co. Ltd. · 1997
- Process for converting FGD gypsum to ammonium sulfate and calcium carbonate7US 8,758,719 B2Sparstane Technologies LLC · 2014