C01B 25/223
Only one form of calcium sulfate being formed
Official title: only one form of calcium sulfate being formed
C01B25/223 (Only one form of calcium sulfate being formed) appears on 89 US grants and 9 published applications in this corpus.
Search patents in C01B- Granted patents
- 89
- Published applications
- 9
- Assignees
- 47
- Inventors
- 115
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 9 | 0 |
| 1983 | 7 | 0 |
| 1984 | 10 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 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 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 1 |
| 2023 | 1 | 2 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Universal chemical processor29 Apr 2025US 12,285,753 B2Advanced Fusion Systems LLC
- Method for removing heavy metals in the manufacture of phosphoric acid11 Feb 2025US 12,221,343 B2Jesa Technologies LLC
- Method for removing cadmium in the manufacture of phosphoric acid6 Jun 2023US 11,667,528 B2Jesa Technologies LLC
- Universal chemical processor18 Oct 2022US 11,471,848 B1Advanced Fusion Systems LLC
- Method for etching a phosphate source using acid9 Aug 2022US 11,407,640 B2Prayon Technologies
- Process for the production of a purified phosphoric acid solution and/or dicalcium phosphate salts11 Jun 2026US 2026/0159391 A1Takhim for Technology and Business Services
- Methods for preparation of ca nutrient to support carbon neutrality4 Dec 2025US 2025/0367598 A1Sabic Agri-Nutrients Company
- Method for removing heavy metals in the manufacture of phosphoric acid16 Nov 2023US 2023/0365409 A1Jesa Technologies LLC
- Universal Chemical Processor27 Apr 2023US 2023/0130681 A1Advanced Fusion Systems LLC
- Method for removing cadmium in the manufacture of phosphoric acid20 Oct 2022US 2022/0332582 A1Jesa Technologies LLC
Most cited
By later US patents
- Automatic control system for phosphoric acid plant31US 5,262,963 AIMC Fertilizer, Inc. · 1993
- Filtration aids for removal of calcium solids from aqueous phosphoric acid23US 4,800,071 ANalco Chemical Company · 1989
- Method of dewatering a wet process phosphoric acid slurry20US 5,185,135 ANalco Chemical Company · 1993
- Process for producing wet process phosphoric acid from phosphate rocks containing fluochlorapatite and related minerals16US 4,485,078 AAgrico Chemical Company · 1984
- Process for the treatment of a calcium aluminophosphate15US 4,321,244 AGroupement Franco-Senagalais d'Etudes et de Recherches Industrielles · 1982