Method for producing phosphoric acid and calcium sulphate quality suitable for a clinker process for the commercial and industrial utilization of calcium sulphate
US-12583747-B2 · Mar 24, 2026 · US
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Purification; Stabilisation; Concentration (purification concomitant with preparation C01B25/22; preparation involving solvent-solvent extraction C01B25/46)
Purification; Stabilisation; Concentration (purification concomitant with preparation C01B25/22; preparation involving solvent-solvent extraction C01B25/46) · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01B25/234 |
| Official title | Purification; Stabilisation; Concentration (purification concomitant with preparation C01B25/22; preparation involving solvent-solvent extraction C01B25/46) |
| Display label | Purification; Stabilisation; Concentration (purification concomitant with preparation C01B25/22; preparation involving solvent-solvent extraction C01B25/46) |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 4 |
| 2020 | 3 |
| 2021 | 1 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for the removal of heavy metals from a phosphoric acid containing composition using a flocculating agent
US-12545582-B2 · Feb 10, 2026 · US
Method for separating and purifying phosphoric acid and phosphogypsum from wet-process phosphoric acid slurry, and phosphoric acid and phosphogypsum prepared thereby
US-12434977-B2 · Oct 7, 2025 · US
Method of recovering and reusing phosphoric acid from fermentation broth or fermentation waste liquid
US-2025236522-A1 · Jul 24, 2025 · US
Method for separating and purifying phosphoric acid and phosphogypsum from wet-process phosphoric acid slurry, and phosphoric acid and phosphogypsum prepared thereby
US-2025162899-A1 · May 22, 2025 · US
Phospate recovery by acid retardation
US-12168618-B2 · Dec 17, 2024 · US
Methods and apparatus for visualising a print on an object
US-12016678-B2 · Jun 25, 2024 · US
Method for producing phosphoric acid and calcium sulphate quality suitable for a clinker process for the commercial and industrial utilization of calcium sulphate
US-2023373789-A1 · Nov 23, 2023 · US
Process for the removal of heavy metals from a phosphoric acid containing composition using a flocculating agent
US-2023227311-A1 · Jul 20, 2023 · US
Method of Recovering Phosphori Acid from Fermentation Broth of Fermentation Waste Liquor and Reusing the Same
US-2021087060-A1 · Mar 25, 2021 · US
Phospate recovery by acid retardation
US-2020377386-A1 · Dec 3, 2020 · US
Phosphate recovery by acid retardation
US-10843941-B2 · Nov 24, 2020 · US
Methods and apparatus for visualising a print on an object
US-2020046266-A1 · Feb 13, 2020 · US
Method for collecting silver ions and phosphoric acid in waste fluid
US-9834825-B2 · Dec 5, 2017 · US
Membranes, azeotropic and catalytic components
US-9731969-B2 · Aug 15, 2017 · US
Multi-stage crystallisation process and apparatus to purify a compound
US-9597609-B2 · Mar 21, 2017 · US
Phosphate Recovery by Acid Retardation
US-2017015568-A1 · Jan 19, 2017 · US
Method for collecting silver ions and phosphoric acid in waste fluid
US-2016076120-A1 · Mar 17, 2016 · US
Multi-Stage Crystallisation Process and Apparatus to Purify a Compound
US-2015360143-A1 · Dec 17, 2015 · US
Membranes, azeotropic & catalytic components
US-2015225240-A1 · Aug 13, 2015 · US