US3100727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus of automatically controlling a sulfuric acid treatment plant for ferrous materials
Assignee: O Fakler & Cie Soc
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Filing: 1960-06-24
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Granted: 1963-08-13
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Expires: 1980-06-24
Abstract
No abstract record available.
Inventors
- 👤 Labergere Jean Louis Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:28
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/36; C01; C01G; C01G49/00; C01G49/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
METHOD OF CONTROLLING A SULFURIC ACID TREATMENT PLANT FOR FERROUS MATERIALS, WHICH COMPRISES PASSING SAID FERROUS MATERIALS THROUGH A BATH OF SULFURIC ACID SOLUTION, WITHDRAWING A PORTION OF SAID SOLUTION, AND PRECIPITATING FERROUS SULFATE MONOHYDRATE THEREFROM, SEPARATING THE MONOHYDRATE PRECIPITATE AND RECYCLING THE CLARIFIED SOLUTION INTO SAID BATH, WITHDRAWING A FURTHER PORTION OF THE SOLUTION FROM SAID BATH AND DISSOLVING AT LEAST PART OF THE SEPARATED MONOHYDRATE THEREIN TO INCREASE THE FERROUS CONTENT OF SAID FURTHER PORTION OF THE SOLUTION, THEREBY GENERATING HEAT, EXPOSING SAID FURTHER PORTION OF THE SOLUTION TO CRYSTALLIZING CONDITIONS FOR PRECIPITATING IRON SULFATE HEPTAHYDRATE THEREFROM, SEPARATING SAID HEPTAHYDRATE TO PROVIDE A REGENERATED SOLUTION, REHEATING SAID REGENERATED SOLUTION, AND RECYCLING THE REHEATED REGENERATED SOLUTION INTO SAID BATH.
Claim 2
Dependent Claim
120 words
METHOD OF CONTROLLING A SULFURIC ACID TREATMENT PLANT FOR FERROUS MATERIALS, WHICH COMPRISES PASSING SAID FERROUS MATERIALS THROUGH A BATH OF SULFURIC ACID SOLUTION, WITHDRAWING A PORTION OF SAID SOLUTION, AND PRECIPITATING FERROUS SULFATE MONOHYDRATE THEREFROM, SEPARATING THE MONOHYDRATE PRECIPITATE AND RECYCLING THE CLARIFIED SOLUTION INTO SAID BATH, WITHDRAWING A FURTHER PORTION OF THE SOLUTION FROM SAID BATH AND DISSOLVING AT LEAST PART OF THE SEPARATED MONOHYDRATE THEREIN TO INCREASE THE FERROUS CONTENT OF SAID FURTHER PORTION OF THE SOLUTION, THEREBY GENERATING HEAT, EXPOSING SAID FURTHER PORTION OF THE SOLUTION TO CRYSTALLIZING CONDITIONS FOR PRECIPITATING IRON SULFATE HEPTAHYDRATE THEREFROM, SEPARATING SAID HEPTAHYDRATE TO PROVIDE A REGENERATED SOLUTION, REHEATING SAID REGENERATED SOLUTION, AND RECYCLING THE REHEATED REGENERATED SOLUTION INTO SAID BATH.
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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |