Patent US3145080A successfully refreshed from Google Patents.
US3145080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of dilute commercial sulfuric acid
Assignee: BASF SE
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Filing: 1961-10-27
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Granted: 1964-08-18
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Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
- 👤 Jockers Kurt
- 👤 Meier Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:44
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PURIFICATION OF DILUTE COMMERCIAL SULFURIC ACID WHICH COMPRISES TREATING SAID SULFURIC ACID IN THE PRESENCE OF ACTIVE CARBON WITH HYDROGEN SULFIDE IN AN AMOUNT BETWEEN ABOUT 2 MG. PER LITER O FSULFURIC ACID AND AN AMOUNT CORRESPONDING TO THE SOLUBILITY OF HYDROGEN SULFICE IN THE SULFURIC ACID AND, AFTER SEPARATING THE ACTIVE CARBON FROM THE SULFURIC ACID, DESROYING THE REMAINDER OF THE HYDROGEN SULFIDE WITH HYDROGEN PEROXIDE IN THE PRESENCE OF ACTIVE CARBON.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PURIFICATION OF DILUTE COMMERCIAL SULFURIC ACID WHICH COMPRISES TREATING SAID SULFURIC ACID IN THE PRESENCE OF ACTIVE CARBON WITH HYDROGEN SULFIDE IN AN AMOUNT BETWEEN ABOUT 2 MG. PER LITER O FSULFURIC ACID AND AN AMOUNT CORRESPONDING TO THE SOLUBILITY OF HYDROGEN SULFICE IN THE SULFURIC ACID AND, AFTER SEPARATING THE ACTIVE CARBON FROM THE SULFURIC ACID, DESROYING THE REMAINDER OF THE HYDROGEN SULFIDE WITH HYDROGEN PEROXIDE IN THE PRESENCE OF ACTIVE CARBON.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |