US2944025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: Sinclair Refining Co
•
Filing: 1957-08-07
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Granted: 1960-07-05
•
Expires: 1977-08-07
Abstract
No abstract record available.
Inventors
- 👤 Verdol Joseph Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:12
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A MINERAL OIL OF LUBRICATING VISCOSITY AND A POLYESTER COMPATIBLE WITH SAID MINERAL OIL IN AN AMOUNT SUFFICIENT TO IMPART SLUDGE-DISPERSING PROPERTIES TO THE LUBRICATING OIL COMPOSITION, SAID POLYESTER BEING CHARACTERIZED BY THE FORMULA:
Claim 2
Dependent Claim
45 words
A LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A MINERAL OIL OF LUBRICATING VISCOSITY AND A POLYESTER COMPATIBLE WITH SAID MINERAL OIL IN AN AMOUNT SUFFICIENT TO IMPART SLUDGE-DISPERSING PROPERTIES TO THE LUBRICATING OIL COMPOSITION, SAID POLYESTER BEING CHARACTERIZED BY THE FORMULA:
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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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |