C01B 25/2285
Dihydrate-anhydrite or hemihydrate-anhydrite process
Official title: {Dihydrate-anhydrite or hemihydrate-anhydrite process}
C01B25/2285 (Dihydrate-anhydrite or hemihydrate-anhydrite process) appears on 4 US grants and 0 published applications in this corpus.
Search patents in C01B- Granted patents
- 4
- Published applications
- 0
- Assignees
- 3
- Inventors
- 5
- Latest grant
- 11 Oct 1988
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Continuous process for preparing phosphoric acid and calcium sulphate11 Oct 1988US 4,777,027 APrayon Developpment, Societe Anonyme
- Method for solidifying waste slime suspensions3 Jul 1984US 4,457,781 AUnited States Gypsum Company
- Process for reducing radioactive contamination in phosphogypsum14 Jun 1983US 4,388,292 AUnited States Gypsum Company
- Process for the preparation of phosphoric acid and calcium sulphate anhydrite as well as phosphoric acid and calcium sulphate anhydrite obtained by this process7 Dec 1982US 4,362,705 AStamicarbon B. V.
No published applications in this class yet.
Most cited
By later US patents
- Continuous process for preparing phosphoric acid and calcium sulphate11US 4,777,027 APrayon Developpment, Societe Anonyme · 1988
- Method for solidifying waste slime suspensions8US 4,457,781 AUnited States Gypsum Company · 1984
- Process for reducing radioactive contamination in phosphogypsum5US 4,388,292 AUnited States Gypsum Company · 1983
- Process for the preparation of phosphoric acid and calcium sulphate anhydrite as well as phosphoric acid and calcium sulphate anhydrite obtained by this process3US 4,362,705 AStamicarbon B. V. · 1982