US3374061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining sulfuric acid
Assignee: Societe Nationale des Petroles dAquitaine SA
•
Filing: 1967-01-31
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Granted: 1968-03-19
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Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Topsoe Haldor
- 👤 Thareau Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/775; C01B17/80; C01B17/806; C01B17/90; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1233627A
Cited
US2042675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |