US3775294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing coke from hydrotreated crude oil
Assignee: Marathon Oil Co
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Filing: 1971-06-28
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Granted: 1973-11-27
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Expires: 1991-06-28
Abstract
Abstract D R A W I N G WHOLE SOUR CRUDE OIL TOGETHER WITH C5-PLUS LIQUID PRODUCTS FROM A COKER ARE HUDROTREATED PRIOR TO SEPARATION INTO VARIOUS BOILING-RANGE PRODUCTS. THE RESIDUAL MATERIAL FROM THIS DISTILLATION IS COKED TO OBTAIN LOW SULFUR COKE AND LIQUID PRODUCTS OF WHICH THE C5-PLUS PORTION IS RECYCLED TO COMMINGLE WITH THE CRUDE OIL PRIOR TO HYDROTREATING. OPTIONALLY, THE CRUDE OIL MAY BE TOPPED TO REMOVE FRACTIONS BOILING IN THE RANGE OF FROM THE INITIAL BOILING POINT OF THE CRUDE TO ABOUT 400*F., PRIOR TO HYDROTREATING.
Inventors
- 👤 A Peterson
- 👤 F Dormish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:28
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/04; C10B55/00
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |