US3565969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of mixed butenes to isoamylenes
Assignee: Phillips Petroleum Co
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Filing: 1968-04-18
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Granted: 1971-02-23
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Expires: 1988-04-18
Abstract
Abstract NORMAL BUTENES AND ISOBUTENE ARE CONVERTED BY A FIRST OLEFIN REACTION TO PRODUCE ISOAMYLENES AND A HEAVIER BRANCHED OLEFIN, AND THE HEAVIER BRANCHED OLEFIN IS CONVERTED, TOGETHER WITH ETHYLENE, IN A SECOND OLEFIN REACTION ZONE, TO PRODUCE ADDITIONAL ISOAMYLENES.
Inventors
- 👤 John F Hutto
- 👤 Rolland E Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:58
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/10; C07C6/00; C07C6/02; C07C6/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |