Patent US2562608A successfully refreshed from Google Patents.
US2562608A
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Purification and recovery of acidic materials
Assignee: Gulf Oil Corp
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Filing: 1946-03-07
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Granted: 1951-07-31
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Expires: 1966-03-07
Abstract
No abstract record available.
Inventors
- 👤 Leslie U Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:36
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/92; C01B17/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
THE PROCESS FOR THE PURIFICATION OF SULFURIC ACID WHICH HAS PREVIOUSLY BEEN CONTACTED WITH HYDROCARBONS AND WHICH ACID CONTAINS SOME REACTION PRODUCTS SOLUBLE IN SULFUR-DIOXIDE AND SOME REACTION PRODUCTS NOT SOLUBLE IN SULFURDIOXIDE WHICH COMPRISES: EXTRACTING THE SULFURIC ACID WITH SULFUR-DIOXIDE AT A TEMPERTURE NOT SUBSTANTIALLY BELOW 70* F. TO EFFECT SUBSTANTIALLY COMPLETE SOLUTION OF THE SULFURIC ACID AND SUCH REACTION PRODUCTS PRESENT THEREIN AS ARE SOLUBLE IN SULFUR-DIOXIDE, WHILE NOT DISSOLVING ALL IMPURITIES OF THE SULFURIC ACID; SEPARATING THE SOLUTION OF SULFURIC ACID AND SULFUR-DIOXIDE AND SULFUR-DIOXIDE-SOLUBLE REACTION PRODUCTS FROM THE UNDISSOLVED REACTION PRODUCTS, THEREBY SEPARATELY OBTAINING THE SULFUR-DIOXIDE INSOLUBLE REACTION PRODUCTS; LOWERING THE TEMPERATURE OF THE SOLUTION OF SULFURIC ACID AND SULFUR-DIOXIDE AND SUL-
References Cited (Backward Citations)
US911553A
Cited
US1409590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |