US2793182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the regeneration of spent alkylation sulfuric acid
Assignee: Standard Oil Co
•
Filing: 1953-08-21
•
Granted: 1957-05-21
•
Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 Visnapuu Naima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:14
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/905
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |