US3556986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Startup procedure for combined hydrofining-reforming process
Assignee: Chevron USA Inc
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Filing: 1969-09-29
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Granted: 1971-01-19
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Expires: 1989-09-29
Abstract
Abstract A COMBINED HYDROFINING-DESULFURIZING-REFORMING SYSTEM IS BROUGHT ON STREAM RAPIDLY WHEN PROCESSING A FEED BOILING IN THE RANGE FROM 150* TO 450*F. AND CONTAINING SUBSTANTIALLY NO C3-C5 HYDROCARBONS, BY INTRODUCING MAKEUP C3-C5 HYDROCARBONS TO THE HYDROFINING ZONE OR DESULFURIZING ZONE AND PERMITTING THE C3-C5 HYDROCARBONS TO BE REFLUXED IN THE DESULFURIZING ZONE.
Inventors
- 👤 Robert R Beck
- 👤 Harold E Knowlton
- 👤 Charles S Mccoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:26
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; C; C10; C10G; C10G35/00; C10G35/22; C10G49/00; C10G49/24; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |