Patent US3804748A successfully refreshed from Google Patents.
US3804748A
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US
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Desulfurization process
Assignee: Texaco Inc
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Filing: 1971-05-07
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Granted: 1974-04-16
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Expires: 1991-05-07
Abstract
Abstract FIELS OILS OF REDUCED SULFUR CONTENT ARE PREPARED BY SEPARATING A RESIDUE-CONTAINING PRETROLEUM FRACTION INTO A VACUUM GAS OIL AND A VACUUM RESIDUUM, CATALYTICALLY HYDRODESULFURIZING THE VACUUM GAS OIL IN THE PRESENCE OF A CATALYST COMPRISING A HYDROGENATING COMPONENT ON A SUPPORT, THE CATALYST HAVING A SURFACE AREA OF AT LEAST 250 M.2/G., A PORE VOLUME OF AT LEAST 0.6 CC./G/ AND CONTAINING AT LEAST 2 WT. PERCENT SILICA AND COMBINING THE DESULFURIZED VACUUM GAS OIL WITH THE VACUUM RESIDUUM.
Inventors
- 👤 G Nelson
- 👤 G Wray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:01
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08; C10G45/72
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |