US3137543A
Expired / Lapsed
US
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Method for determining the phosphate content of phosphatic materials
Assignee: International Minerals and Chemical Corp
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Filing: 1960-06-24
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Granted: 1964-06-16
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Expires: 1980-06-24
Abstract
No abstract record available.
Inventors
- 👤 Charles J Barton
- 👤 James E Lawver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/117497; Y10T436/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR DETERMINING THE ACID REACTABLE PHOSPHORUS CONTENT OF SOLID PHOSHATIC MATERIAL WHICH COMPRISES PLACING A PREDETERMINED WEIGHT OF SAID PHOSPHATIC MATERIAL INTO A REACTION ZONE, CONTINUOUSLY PASSING INTO SAID REACTION ZONE AT A SUBTANTIAL CONSTANT PREDETERMINED RATE A STRONG MINERAL ACID HAVING A SUBSTANTIALLY CONSTANT PREDETERMINED CONCENTRATION AND CAPALBE OF CONVERTING SUBSTANTIALLY ALL OF THE ACID REACTABLE PHOSPHORUS VALUES IN SAID PHOSPHAIC MATERIAL INTO PHOSPHORIC ACID, MAINTAINING AGITATING CONDITIONS IN SAID REACTON ZONE, CONTINUOUSLY OVERFLOWING THE SOLUTION FROM SAID REACTION ZONE INTO A SEPARTION ZONE IN WHICH THE PHOSPHORIC ACID VALUES ARE SEPARATED, WITHDRAWING AT A SUBSTANTIALLY
Claim 2
Independent Claim
99 words
A METHOD FOR DETERMINING THE ACID REACTABLE PHOSPHORUS CONTENT OF SOLID PHOSHATIC MATERIAL WHICH COMPRISES PLACING A PREDETERMINED WEIGHT OF SAID PHOSPHATIC MATERIAL INTO A REACTION ZONE, CONTINUOUSLY PASSING INTO SAID REACTION ZONE AT A SUBTANTIAL CONSTANT PREDETERMINED RATE A STRONG MINERAL ACID HAVING A SUBSTANTIALLY CONSTANT PREDETERMINED CONCENTRATION AND CAPALBE OF CONVERTING SUBSTANTIALLY ALL OF THE ACID REACTABLE PHOSPHORUS VALUES IN SAID PHOSPHAIC MATERIAL INTO PHOSPHORIC ACID, MAINTAINING AGITATING CONDITIONS IN SAID REACTON ZONE, CONTINUOUSLY OVERFLOWING THE SOLUTION FROM SAID REACTION ZONE INTO A SEPARTION ZONE IN WHICH THE PHOSPHORIC ACID VALUES ARE SEPARATED, WITHDRAWING AT A SUBSTANTIALLY
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |