Patent US2790702A successfully refreshed from Google Patents.
US2790702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid treatment of phosphate rock to recover phosphates and uranium
Assignee: Individual
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Filing: 1955-06-21
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Granted: 1957-04-30
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Robert F Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:03
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026; A; A23; A23K; A23K20/00; A23K20/20; A23K20/26; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/26; C01B25/32; C01B25/324; C01G; C01G43/00; C01G43/04; C01G43/06; C05; C05B; C05B1/00; C05B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE PROCESS OF RECOVERING MINERAL VALUES WHICH COMPRISES ADMIXING PHOSPHATE ROCK AND SULFURIC ACID TO FORM A PASTY ACID MIX, SAID SULFURIC ACID BEING ADDED IN AN AMOUNT SUFFICIENT TO PRODUCE PREDOMINANTLY MONOCALCIUM PHOSPHATE, MIXING GASEOUS CHLORINE INTO THE ADMIXTURE, LEACHING THE ADMIXTURE WITH AQUEOUS MEDIUM, SEPARATING INSOLUBLE MATERIAL FROM AQUEOUS SOLUTION OF REACTION PRODUCTS, REACTING THE INSOLUBLE MATERIAL WITH SUFFLCILENT SULFURIC ACID TO CONVERT THE PREVIOUSLY UNREACTED MATERIAL TO WATER SOLUBLE REACTION PRODUCTS, CONTACTING THE SOLUTION OF WATER SOLUBLE REACTION PRODUCTS WITH AN AGENT FOR SELECTIVELY REMOVING URANIUM VALUES THEREFROM AND RECOVERING FROM THE AQUEOUS SOLUTION OF REACTION PRODUCTS AT LEAST, THE P2O5 COMPONENTS.
Claim 2
Dependent Claim
105 words
THE PROCESS OF RECOVERING MINERAL VALUES WHICH COMPRISES ADMIXING PHOSPHATE ROCK AND SULFURIC ACID TO FORM A PASTY ACID MIX, SAID SULFURIC ACID BEING ADDED IN AN AMOUNT SUFFICIENT TO PRODUCE PREDOMINANTLY MONOCALCIUM PHOSPHATE, MIXING GASEOUS CHLORINE INTO THE ADMIXTURE, LEACHING THE ADMIXTURE WITH AQUEOUS MEDIUM, SEPARATING INSOLUBLE MATERIAL FROM AQUEOUS SOLUTION OF REACTION PRODUCTS, REACTING THE INSOLUBLE MATERIAL WITH SUFFLCILENT SULFURIC ACID TO CONVERT THE PREVIOUSLY UNREACTED MATERIAL TO WATER SOLUBLE REACTION PRODUCTS, CONTACTING THE SOLUTION OF WATER SOLUBLE REACTION PRODUCTS WITH AN AGENT FOR SELECTIVELY REMOVING URANIUM VALUES THEREFROM AND RECOVERING FROM THE AQUEOUS SOLUTION OF REACTION PRODUCTS AT LEAST, THE P2O5 COMPONENTS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |