Patent US2991246A successfully refreshed from Google Patents.
US2991246A
Expired / Lapsed
US
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Detergent multigrade lubricant
Assignee: Sinclair Refining Co
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Filing: 1957-06-25
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Granted: 1961-07-04
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Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 Milton P Kleinholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2010/14; C10N2010/16; C10N2020/00; C10N2020/01; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF A MINERAL OIL OF LUBRICATING VISCOSITY AND HAVING INCORPORATED THEREIN FROM ABOUT 1 TO 3 PERCENT BY WEIGHT OF A METHACRYLATE ESTER POLYMER IN WHICH THE ESTER RADICAL CONTAINS 4 TO 20 CARBON ATOMS TO PROVIDE A LUBRICATING COMPOSITION WHOSE VISCOSITY CHARACTERISTICS SATISFY AT LEAST THREE SAE GRADES AND A SMALL AMOUNT OF AN OIL-SOLUBLE CARBONATED BASIC BARIUM PETROLEUM MAHOGANY SULFONATE, SAID SULFONATE BEING SUFFICIENT TO PROVIDE A BARIUM CONTENT OF ABOUT 0.5 TO 1.5 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
88 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF A MINERAL OIL OF LUBRICATING VISCOSITY AND HAVING INCORPORATED THEREIN FROM ABOUT 1 TO 3 PERCENT BY WEIGHT OF A METHACRYLATE ESTER POLYMER IN WHICH THE ESTER RADICAL CONTAINS 4 TO 20 CARBON ATOMS TO PROVIDE A LUBRICATING COMPOSITION WHOSE VISCOSITY CHARACTERISTICS SATISFY AT LEAST THREE SAE GRADES AND A SMALL AMOUNT OF AN OIL-SOLUBLE CARBONATED BASIC BARIUM PETROLEUM MAHOGANY SULFONATE, SAID SULFONATE BEING SUFFICIENT TO PROVIDE A BARIUM CONTENT OF ABOUT 0.5 TO 1.5 PERCENT BY WEIGHT.
Claim 3
Dependent Claim
43 words
THE LUBRICATING COMPOSITION OF CLAIM 1 WHICH CONTAINS A SMALL AMOUNT OF ZINC DITHIOPHOSPHATE DIESTER IN WHICH THE ORGANIC GROUPS CONTAIN FROM ABOUT 4 TO 20 CARBON ATOMS SUFFICIENT TO PROVIDE A PHOSPHORUS LEVEL OF FROM ABOUT 0.03 TO 0.2 PERCENT BY WEIGHT.
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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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |