US3684686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining low pour fuel oil
Assignee: Texaco Inc
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Filing: 1970-05-26
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Granted: 1972-08-15
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Expires: 1990-05-26
Abstract
Abstract THE INTRODUCTION OF A DEWAXING AID INTO WAXY CRUDES FOLLOWED BY PREHEATING OF THE CRUDE AND THE ADDITIVE PRIOR TO DEWAXING INCREASES THE AMOUNT OF HEAVIER WAX REJECT STREAM AND THE FUEL OIL (OR 650*F. FRACTION) RECOVERED FROM THE DEWAXED CRUDE BY FRACTIONATION HAS A REDUCED POUR POINT. THE REDUCTION IN POUR POINTS RANGES FROM 10* TO 35*F.
Inventors
- 👤 Sheldon Herbstman
- 👤 Reese A Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/04
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |