Patent US3733259A successfully refreshed from Google Patents.
US3733259A
Expired / Lapsed
US
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Treatment of heavy petroleum oils
Assignee: Texaco Inc
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Filing: 1971-11-10
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Granted: 1973-05-15
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Expires: 1991-11-10
Abstract
Abstract ASPHALTENES AND METALS ARE REMOVED FROM HEAVY PETROLEUM OILS BY DISPERSING THE OIL IN STEAM AT A TEMPRATURE OF AT LEAST 750*F. THEN COOLING TO FORM A STABLE WATRASPHALTENE EMULSION. AFTER SEPARATION FROM THE EMULSION, THE TREATED OIL MAY BE USED AS A FUEL OR SUBJECTED TO HYDROCONVERSION.
Inventors
- 👤 R Wilson
- 👤 E Cole
- 👤 R Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:26
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/0463; C10G31/00; C10G31/08; 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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |