US3002812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of defluorinated phosphates
Assignee: International Minerals and Chemical Corp
•
Filing: 1959-02-19
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Granted: 1961-10-03
•
Expires: 1979-02-19
Abstract
No abstract record available.
Inventors
- 👤 William B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:42
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/328; C05; C05B; C05B11/00; C05B11/04; C05B11/12; Y; Y10; Y10S; Y10S71/00; Y10S71/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR MANUFACTURING A PHOSPHATE PRODUCT OF LOW FLUORINE CONTENT FROM PHOSPHATE ROCK CONTAINING FLUORINE AND SILICA WHICH COMPRISES DIGESTING SAID PHOSPHATE ROCK IN SUFFICIENT HYDROCHLORIC ACID SOLUTION TO DECOMPOSE SUBSTANTIALLY ALL OF THE PHOSPHATE IN SAID ROCK TO FORM PHOSPHORIC ACID, SEPARATING REMAINING SOLIDS FROM THE RESULTANT DIGESTION MASS TO PRODUCE A SUBSTANTIALLY SOLIDS FREE LIQUID, SUBJECTING SAID SUBSTANTIALLY SOLIDS FREE LIQUID TO EVAPORATION TO PRODUCE A FIRST SOLID OF LOWER FLUORINE CONTENT THAN SAID PHOSPHATE ROCK, SAID SOLID CONTAINING A PHOSPHATE OF CALCIUM AND CALCIUM FLUORIDE, DIGESTING SAID FIRST SOLID IN AN AQUEOUS MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND HYDROCHLORIC ACID SOLUTION TO DISSOLVE SUBSTANTIALLY ALL OF SAID PHOSPHATE OF
Claim 2
Dependent Claim
116 words
A PROCESS FOR MANUFACTURING A PHOSPHATE PRODUCT OF LOW FLUORINE CONTENT FROM PHOSPHATE ROCK CONTAINING FLUORINE AND SILICA WHICH COMPRISES DIGESTING SAID PHOSPHATE ROCK IN SUFFICIENT HYDROCHLORIC ACID SOLUTION TO DECOMPOSE SUBSTANTIALLY ALL OF THE PHOSPHATE IN SAID ROCK TO FORM PHOSPHORIC ACID, SEPARATING REMAINING SOLIDS FROM THE RESULTANT DIGESTION MASS TO PRODUCE A SUBSTANTIALLY SOLIDS FREE LIQUID, SUBJECTING SAID SUBSTANTIALLY SOLIDS FREE LIQUID TO EVAPORATION TO PRODUCE A FIRST SOLID OF LOWER FLUORINE CONTENT THAN SAID PHOSPHATE ROCK, SAID SOLID CONTAINING A PHOSPHATE OF CALCIUM AND CALCIUM FLUORIDE, DIGESTING SAID FIRST SOLID IN AN AQUEOUS MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND HYDROCHLORIC ACID SOLUTION TO DISSOLVE SUBSTANTIALLY ALL OF SAID PHOSPHATE OF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |