US3662019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of monoolefins
Assignee: Shell USA Inc
•
Filing: 1970-05-18
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Granted: 1972-05-09
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Expires: 1990-05-18
Abstract
Abstract PARAFFINS ARE DEHYDROGENATED BY CONTACT WITH A SUPPORTED NOBEL METAL CATALYST, WHICH ADDITIONALLY CONTAINS AT LEAST ONE METAL OF GROUPS IIB AND VIIB, AT A TEMPERATURE OF FROM 350*C. TO 550*C. AND IN THE PRESENCE OF HYDROGEN.
Inventors
- 👤 Jan L Stratenus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:26
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/0201; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/62; B01J23/622; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |