US2967146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum refining process
Assignee: Texaco Inc
•
Filing: 1957-12-30
•
Granted: 1961-01-03
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert E Manley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:49
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/14; C10G67/04; C10G67/0409; C10G67/0436
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF TREATING AN ASPHALT-FREE WAXY HYDROCARBON FRACTION WHICH COMPRISES SOLVENT DEWAXING SAID FRACTION TO YIELD A DEWAXED OIL, SOLVENT REFINING SAID DEWAXED OIL BY CONTACT WITH A LIQUID SELECTIVE SOLVENT FOR AROMATIC HYDROCARBONS WHICH IS AT LEAST PARTIALLY IMMISCIBLE WITH SAID OIL TO PRODUCE A RAFFINTE FRACTION HAVING A RELATIVELY HIGH VISCOSITY INDEX AND A REDUCED AROMATIC CONTENT AND AN EXTRACT FRACTION HAVING A RELATIVELY LOW VISCOSITY INDEX AND AN INCREASED AROMATIC CONTENT, RECOVERING SAID RAFFINATE FRACTION, HYDROGENATING SAID EXTRACT FRACTION TO IMPROVE SUBSTANTIALLY ITS VISCOSITY INDEX BY AT LEAST ABOUT 20 V.I. NUMBERS, FRACTIONATING THE RESULTING HYDROGENATED EXTRACT FRACTION TO REMOVE THEREFROM RELATIVELY LOW BOILING HYDROCARBONS AND RECOVERING THE RESULTING FRACTIONATED HYDROGENATED EXTRACT FRACTION AS A LUBRICATING OIL PRODUCT.
Claim 2
Independent Claim
122 words
A METHOD OF TREATING AN ASPHALT-FREE WAXY HYDROCARBON FRACTION WHICH COMPRISES SOLVENT DEWAXING SAID FRACTION TO YIELD A DEWAXED OIL, SOLVENT REFINING SAID DEWAXED OIL BY CONTACT WITH A LIQUID SELECTIVE SOLVENT FOR AROMATIC HYDROCARBONS WHICH IS AT LEAST PARTIALLY IMMISCIBLE WITH SAID OIL TO PRODUCE A RAFFINTE FRACTION HAVING A RELATIVELY HIGH VISCOSITY INDEX AND A REDUCED AROMATIC CONTENT AND AN EXTRACT FRACTION HAVING A RELATIVELY LOW VISCOSITY INDEX AND AN INCREASED AROMATIC CONTENT, RECOVERING SAID RAFFINATE FRACTION, HYDROGENATING SAID EXTRACT FRACTION TO IMPROVE SUBSTANTIALLY ITS VISCOSITY INDEX BY AT LEAST ABOUT 20 V.I. NUMBERS, FRACTIONATING THE RESULTING HYDROGENATED EXTRACT FRACTION TO REMOVE THEREFROM RELATIVELY LOW BOILING HYDROCARBONS AND RECOVERING THE RESULTING FRACTIONATED HYDROGENATED EXTRACT FRACTION AS A LUBRICATING OIL PRODUCT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |