Patent US3579598A successfully refreshed from Google Patents.
US3579598A
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US
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Dehydrocyclization process and catalyst
Assignee: Union Oil Company of California
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Filing: 1967-08-14
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Granted: 1971-05-18
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Expires: 1987-08-14
Abstract
Abstract PARAFFIN HYDROCARBONS ARE CONVERTED TO AROMATIC HYDROCARBONS BY DEHYDROCYCLIZATION AT ELEVATED TEMPERATURES AND LOW PRESSURES, IN THE PRESENCE OF ADDED HYDROGEN AND A CATALYST COMPRISING MINOR PROPORTIONS OF A GROUP VIII NOBLE METAL AND AT LEAST ONE OXIDE OF THE METALS CALCIUM, STRONTIUM, OR BARIUM, SUPPORTED ON A ILICA GEL BASE.
Inventors
- 👤 Rowland C Hansford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:17
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/415; C07C5/417; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |