US2554282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil manufacture
Assignee: Standard Oil Development Co
•
Filing: 1946-09-12
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Granted: 1951-05-22
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Expires: 1966-09-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Alexis Voorhies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C10G45/48; C10G45/50; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF UPGRADING A LUBRICATING OIL STOCK WHICH CONSISTS ESSENTIALLY IN SUBJECTING SAID STOCK TO THE INFLUENCE OF HYDROGEN AND MILD HYDROGENATION CONDITIONS OF TEMPERATURE AND PRESSURE IN THE PRESENCE OF A CATALYST WHICH CONSISTS ESSENTIALY OF A MIXTURE OF TWO MOLS OF NICKEL SULFIDE AND ONE MOL OF TUNGSTEN SULFIDE FOR A SUFFICIENT PERIOD OF TIME OF EFFECT THE CONVERSION OF A MAJOR PORTION OF SAID STOCK TO A LUBRICATING OIL OF IMPROVED VISCOSITY INDEX AND THEREAFTER RECOVERING SAID IMPROVED LUBRICATING OIL.
Claim 2
Independent Claim
84 words
THE METHOD OF UPGRADING A LUBRICATING OIL STOCK WHICH CONSISTS ESSENTIALLY IN SUBJECTING SAID STOCK TO THE INFLUENCE OF HYDROGEN AND MILD HYDROGENATION CONDITIONS OF TEMPERATURE AND PRESSURE IN THE PRESENCE OF A CATALYST WHICH CONSISTS ESSENTIALY OF A MIXTURE OF TWO MOLS OF NICKEL SULFIDE AND ONE MOL OF TUNGSTEN SULFIDE FOR A SUFFICIENT PERIOD OF TIME OF EFFECT THE CONVERSION OF A MAJOR PORTION OF SAID STOCK TO A LUBRICATING OIL OF IMPROVED VISCOSITY INDEX AND THEREAFTER RECOVERING SAID IMPROVED LUBRICATING OIL.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |