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US2550413A
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Alkylation process
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1945-12-15
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Granted: 1951-04-24
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Expires: 1965-12-15
Abstract
No abstract record available.
Inventors
- 👤 Gislon Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:35
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1953702A
Cited
US2373062A
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US2364203A
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US2338711A
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US2385187A
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US2388758A
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US2400437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |