US3737473A
Expired / Lapsed
US
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Two-stage dehydrogenation process
Assignee: Phillips Petroleum Co
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Filing: 1970-07-27
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Granted: 1973-06-05
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Expires: 1990-07-27
Abstract
Abstract A TWO-STAGE DEHYDROGENATION PROCESS FOR ISOPENTANE CONTAINING FEEDSTREAMS COMPRISING A NON-OXIDATIVE PARAFFIN DEHYDROGENATION STAGE FOLLOWED BY A IRON PHOSPHATE CATALYZED OLEFIN OXIDATIVE DEHYDROGENATION STAGE WHEREIN SAID PROCESS ELIMINATES THE NECESSITY OF HYDROGENATION SEPARATION STEPS BETWEEN THE NON-OXIDATIVE AND THE OXIDATIVE STAGES.
Inventors
- 👤 D Ripley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:13
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/173; C07C11/18; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; C07C5/42; C07C5/48; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/06; C07C2523/14; C07C2523/38; C07C2523/40; C07C2523/42; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |