Patent US3663434A successfully refreshed from Google Patents.
US3663434A
Expired / Lapsed
US
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Desulfurization
Assignee: Chevron USA Inc
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Filing: 1970-01-12
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Granted: 1972-05-16
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Expires: 1990-01-12
Abstract
Abstract A PROCESS FOR HYDRODESULFURIZATION OF A HEAVY OIL CONTAINING IRON AS AN ORGANOMETALLIC COMPOUND, WHICH COMPRISES: (A) PASSING THE HEAVY OIL AT AN ELEVATED TEMPERATURE, TOGETHER WITH HYDROGEN, THROUGH A FIRST FIXED CATALYST BED WHICH HAS INCREASING CATALYTIC HYDROGENATION ACTIVITY ALONG THE NORMAL DIRECTION OF FEED FLOW THROUGH THE FIRST BED; AND (B) PASSING AT LEAST A PORTION OF THE EFFLUENT FROM THE FIRST BED, AT AN ELEVATED TEMPERATURE AND PRESSURE, AND IN THE PRESENCE OF HYDROGEN THROUGH A SECOND FIXED BED CONTAINING SULFACTIVE CATALYST PARTICLES HAVING A SURFACE ARE OF AT LEAST 100M 2/G.
Inventors
- 👤 Alan G Bridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:06
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G2300/00; C10G2300/10; C10G2300/107
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |