US3136711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing the pour points of crude oils
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1961-03-27
•
Granted: 1964-06-09
•
Expires: 1981-03-27
Abstract
No abstract record available.
Inventors
- 👤 Marvin B Glaser
- 👤 Lichtenstein Ira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:17
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/06; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN IMPROVED PROCESS FOR THE REFINING OF A CRUDE OIL OF HIGH POUR POINT, CONTAINING WAX AND ASPHALT FRACTIONS, TO REDUCE ITS POUR POINT, WHICH COMPRISES HEATING AN ENTIRE CRUDE TO A TEMPERATURE OF FROM 160 TO 220*F., COOLING THE OIL TO A POINT JUST ABOVE THE CLOUD POINT AND THEREAFTER SLOWLY AT A CONTROLLED RATE UNTIL A TEMPERATURE BETWEEN 35 AND 55*F. HAS BEEN REACHED THEREBY PRECIPITATING A PORTION OF THE SAID WAX FRACTION FROM THE SAID CRUDE OIL, CENTRIFUGING THE PRECIPITATED WAX AGGLOMERATES AT A TEMPERATURE BETWEEN 35 AND 55*F. TO SEPARATE A DENSE WAX PHASE FROM THE CRUDE, ADN RECOVERING A CRUDE OF SUBSTANTIALLY LOWER POUR POINT.
Claim 2
Dependent Claim
110 words
AN IMPROVED PROCESS FOR THE REFINING OF A CRUDE OIL OF HIGH POUR POINT, CONTAINING WAX AND ASPHALT FRACTIONS, TO REDUCE ITS POUR POINT, WHICH COMPRISES HEATING AN ENTIRE CRUDE TO A TEMPERATURE OF FROM 160 TO 220*F., COOLING THE OIL TO A POINT JUST ABOVE THE CLOUD POINT AND THEREAFTER SLOWLY AT A CONTROLLED RATE UNTIL A TEMPERATURE BETWEEN 35 AND 55*F. HAS BEEN REACHED THEREBY PRECIPITATING A PORTION OF THE SAID WAX FRACTION FROM THE SAID CRUDE OIL, CENTRIFUGING THE PRECIPITATED WAX AGGLOMERATES AT A TEMPERATURE BETWEEN 35 AND 55*F. TO SEPARATE A DENSE WAX PHASE FROM THE CRUDE, ADN RECOVERING A CRUDE OF SUBSTANTIALLY LOWER POUR POINT.
References Cited (Backward Citations)
US369902A
Cited
US1416890A
Cited
US1732143A
Cited
US1974398A
Cited
US2100662A
Cited
US2770577A
Cited
GB851135A
Cited
US3038854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |