Patent US2933372A successfully refreshed from Google Patents.
US2933372A
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Method of defluorinating phosphatic material
Assignee: International Minerals and Chemical Corp
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Filing: 1956-11-02
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Granted: 1960-04-19
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Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 Paul D V Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:19
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/2343; Y; Y10; Y10S; Y10S71/00; Y10S71/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR ELIMINATING FLUORINE FROM AN AQUEOUS SOLUTION OF FLUORINE-CONTAINING PHOSPHATIC MATERIALS WHICH COMPRISES INTRODUCING SAID AQUEOUS SOLUTION OF FLUORINE-CONTAINING PHOSPHATIC MATERIAL, OBTAINABLE BY ACIDULATING PHOSPHATE ROCK, UNDER SUFFICIENT SUPERATMOSPERIC TEMPERATURE AND SUPERATMOSPHERIC PRESSURE TO SUPPRESS VAPORIZATION OF SAID SOLUTION, INTO A LOW PRESSURE ZONE OF LOWER PRESSURE THAN THAT MAINTAINED ON THE SOLUTION BEING INTRODUCED INTO SAID ZONE WITHOUT INTRODUCING EXTRANEOUS HEAT INTO SAID ZONE AND WITH RESPECT TO WHICH THE TEMPERATURE OF SAID SOLUTION IS SUBSTANTIALLY ABOVE ITS BOILING POINT TO CAUSE AT LEAST A SUBSTANTIAL
Claim 2
Dependent Claim
89 words
A PROCESS FOR ELIMINATING FLUORINE FROM AN AQUEOUS SOLUTION OF FLUORINE-CONTAINING PHOSPHATIC MATERIALS WHICH COMPRISES INTRODUCING SAID AQUEOUS SOLUTION OF FLUORINE-CONTAINING PHOSPHATIC MATERIAL, OBTAINABLE BY ACIDULATING PHOSPHATE ROCK, UNDER SUFFICIENT SUPERATMOSPERIC TEMPERATURE AND SUPERATMOSPHERIC PRESSURE TO SUPPRESS VAPORIZATION OF SAID SOLUTION, INTO A LOW PRESSURE ZONE OF LOWER PRESSURE THAN THAT MAINTAINED ON THE SOLUTION BEING INTRODUCED INTO SAID ZONE WITHOUT INTRODUCING EXTRANEOUS HEAT INTO SAID ZONE AND WITH RESPECT TO WHICH THE TEMPERATURE OF SAID SOLUTION IS SUBSTANTIALLY ABOVE ITS BOILING POINT TO CAUSE AT LEAST A SUBSTANTIAL
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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |