Patent US3751514A successfully refreshed from Google Patents.
US3751514A
Expired / Lapsed
US
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Preparation of isobutylene and propylene from isobutane
Assignee: Goodyear Tire and Rubber Co
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Filing: 1971-06-21
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Granted: 1973-08-07
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Expires: 1991-06-21
Abstract
Abstract THERE IS DISCLOSED A PROCESS FOR THE SIMULTANEOUS PREPARATION OF ISOBUTYLENE AND PROPYLENE FROM ISOBUTANE IN THE PRESENCE OF A HOMOGENEOUS CATALYST SYSTEM. HYDROGEN SULFIDE, METHYL MERCAPTAN, AMMONIUM HYDROSULFIDE, AMMONIUM BROMIDE AND AMMONIUM SULFIDE ARE DISCLOSED AS REPRESENTATIVE EXAMPLES OF THE HOMOGENEOUS CATALYST SYSTEM EMPLOYED.
Inventors
- 👤 F Hoppstock
- 👤 J Goodwin
- 👤 K Frech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:58
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/10; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C2527/00; C07C2527/02; C07C2527/04; C07C2527/06; C07C2527/08
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |