US2906688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing very low pour oils from waxy oils having boiling ranges of 680 deg.-750 deg. f. by distilling off fractions and solvents dewaxing each fraction
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-03-28
•
Granted: 1959-09-29
•
Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 Michael H Farmer
- 👤 John L Tiedje
- 👤 David M Macleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:17
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR PRODUCING A LOW POUR POINT OIL WHICH COMPRISES DISTILLING A WAX-CONTAINING PETROLEUM OIL, RE CONVERT A FRACTION HAVING A BOILING RANGE OF LESS THAN ABOUT 20*F. AND HAVING INITAL AND FINAL BOILING POINTS WITHIN THE RANGE BETWEEN ABOUT 680*F. AND ABOUT 750* F. AT ATMOSPHERIC PRESSURE, DEWAXING SAID FRACTION AT A TEMPERATURE BETWEEN ABOUT -10*F. AND ABOUT +30* F. IN THE PRESENCE OF A KETONE DEWAXING SOLVENT, AND RECOVERING A DEWAXED OIL HAVING A POUR POINT AT LEAST ABOUT 20*F. BELOW THE DEWAXING TEMPERATURE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR PRODUCING A LOW POUR POINT OIL WHICH COMPRISES DISTILLING A WAX-CONTAINING PETROLEUM OIL, RE CONVERT A FRACTION HAVING A BOILING RANGE OF LESS THAN ABOUT 20*F. AND HAVING INITAL AND FINAL BOILING POINTS WITHIN THE RANGE BETWEEN ABOUT 680*F. AND ABOUT 750* F. AT ATMOSPHERIC PRESSURE, DEWAXING SAID FRACTION AT A TEMPERATURE BETWEEN ABOUT -10*F. AND ABOUT +30* F. IN THE PRESENCE OF A KETONE DEWAXING SOLVENT, AND RECOVERING A DEWAXED OIL HAVING A POUR POINT AT LEAST ABOUT 20*F. BELOW THE DEWAXING TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |