US3118730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidic phosphatic solutions
Assignee: International Minerals and Chemical Corp
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Filing: 1959-10-14
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Granted: 1964-01-21
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Expires: 1979-10-14
Abstract
No abstract record available.
Inventors
- 👤 John D Nickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:13
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A NOVEL COMPOSITION OF MATTER IN WHICH THE AMOUNT OF SOLIDS PRECIPITATED IS SIGNIFICANTLY DECREASED COMPRISING AN AQUEOUS, INORGANIC, ACIDIC, PHOSPHATIC SOLUTION SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID AND CALCIUM PHOSPHATE SOLUTIONS CHARACTERIZED BY A CAO/O2O5 MOLE RATIO OF NOT MORE THAN ABOUT 1:1, SAID SOLUTION PREPARED FROM ACIDULATED PHOSPHATE ROCK AND CONTAINING SUSPENDED SOLID IMPURITIES, AND A CHELATING AGENT CAPABLE OF FORMING A METAL COMPLEX AT A PH BELOW 7, SAID CHELATING AGENT PRESENT IN AN AMOUNT EFFECTIVE TO SUBSTANTIALLY DECREASE THE MOUNT OF SOLID IMPURITIES PRECIPITATED FROM SAID SOLUTION.
Claim 2
Dependent Claim
93 words
A NOVEL COMPOSITION OF MATTER IN WHICH THE AMOUNT OF SOLIDS PRECIPITATED IS SIGNIFICANTLY DECREASED COMPRISING AN AQUEOUS, INORGANIC, ACIDIC, PHOSPHATIC SOLUTION SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID AND CALCIUM PHOSPHATE SOLUTIONS CHARACTERIZED BY A CAO/O2O5 MOLE RATIO OF NOT MORE THAN ABOUT 1:1, SAID SOLUTION PREPARED FROM ACIDULATED PHOSPHATE ROCK AND CONTAINING SUSPENDED SOLID IMPURITIES, AND A CHELATING AGENT CAPABLE OF FORMING A METAL COMPLEX AT A PH BELOW 7, SAID CHELATING AGENT PRESENT IN AN AMOUNT EFFECTIVE TO SUBSTANTIALLY DECREASE THE MOUNT OF SOLID IMPURITIES PRECIPITATED FROM SAID SOLUTION.
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) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |