Patent US3726810A successfully refreshed from Google Patents.
US3726810A
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Rhenium-alumina catalyst and method of activating same with anhydrous treating agents
Assignee: Phillips Petroleum Co
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Filing: 1970-12-24
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Granted: 1973-04-10
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Expires: 1990-12-24
Abstract
Abstract AN ACTIVATED RHENIUM-ALUMINA CATALYST IS PREPARED BY HEATING RHENIUM-CONTAINING ALUMINA AT 400-1500*F. IN A DRY AMBIENT AND TREATING IT WITH ANHYDROUS TREATING AGENTS, I.E. C.2, HCL, HBR, BR2 AND BR DERIVATIVES OF METHANE, AT 400-1500*F. THE ACTIVATED CATALYST FINDS UTILITY IN THE ISOMERIZATION OF PARAFFINS AND NAPHTHENES.
Inventors
- 👤 J Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:50
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/36; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6567; B01J37/00; B01J37/22; C07C5/2767; C07C5/277; C07C5/2791
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |