US3073676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering fluorine from solid residues by pyrohydrolysis
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1961-07-25
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Granted: 1963-01-15
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Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Mollard Paul
- 👤 Turpin Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:00
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF RECOVERING FLUORINE IN THE FORM OF HYDROFLUORIC ACID FROM SOLIDS RESIDUES RESULTING FROM THE ELECTROLYTIC PRODUCTION OF ALUMINUM, WHICH COMPRISES HEATING AND RESIDUES TO TEMPERATURE OF ABOUT 600 TO 1100*C. AND FLOWING THERETHROUGH A MIXTURE OF STEAM AND A DILUTING GAS DEVIOD TO EFFECT ON THE LIBERATED HYDROFLUORIC ACID, THE AMOUNT OF STEAM USED BEING LESS THAN 60 KG. PER KG. OF FLUORINE RECOVERED, SAID MIXTURE BEING ABOUT 25 TO 75% OF STEAM AND ABOUT 75 TO 25% OF DILUTING GAS.
Claim 2
Dependent Claim
84 words
THE PROCESS OF RECOVERING FLUORINE IN THE FORM OF HYDROFLUORIC ACID FROM SOLIDS RESIDUES RESULTING FROM THE ELECTROLYTIC PRODUCTION OF ALUMINUM, WHICH COMPRISES HEATING AND RESIDUES TO TEMPERATURE OF ABOUT 600 TO 1100*C. AND FLOWING THERETHROUGH A MIXTURE OF STEAM AND A DILUTING GAS DEVIOD TO EFFECT ON THE LIBERATED HYDROFLUORIC ACID, THE AMOUNT OF STEAM USED BEING LESS THAN 60 KG. PER KG. OF FLUORINE RECOVERED, SAID MIXTURE BEING ABOUT 25 TO 75% OF STEAM AND ABOUT 75 TO 25% OF DILUTING GAS.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |