US2944974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Shell USA Inc
•
Filing: 1956-12-31
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Granted: 1960-07-12
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Lorensen Lyman Edward
- 👤 Zachar John
- 👤 Jones Robert Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:03
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2229/00; C10M2229/04; C10M2229/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND A MINOR AMOUNT, SUFFICIENT TO IMPROVE THE POUR POINT, VISCOSITY INDEX AND DETERGENCY OF THE OIL, OF AN OIL-SOLUBLE COPOLYMER OF (1) A MONOVINYL-SUBSTITUTED VINYLPYRIDINE OF THE GROUP CONSISTING OF AN UNSUBSTITUTED VINYLPYRIDINE AND DERIVATIVES OF THE SAID VINYLPYRIDINE HAVING A LOWER ALKYL GROUP SUBSTITUTED ON A RING CARBON ATOM, (2) A MIXTURE OF A STEARYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID AND A LAURYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN THE MOL RATIO VARYING FROM 1:4 TO 4:1, RESPECTIVELY, AND (3) AC1-4 ALKYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN AN AMOUNT OF FROM 10 TO 60 MOL PERCENT OF THE ESTER MIXTURE OF (2), THE MOL RATIO OF (1) AND THE ESTER MIXTURE OF (2) AND (3) VARYING FROM 1:2 TO 1:10 RESPECTIVELY SAID POLYMER HAVING AN AVERAGE ALKYL CHAIN LENGHT OF FROM C12 TO C14 CARBON ATOMS, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 5X10**4 TO 2.5X10**6
Claim 2
Dependent Claim
194 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND A MINOR AMOUNT, SUFFICIENT TO IMPROVE THE POUR POINT, VISCOSITY INDEX AND DETERGENCY OF THE OIL, OF AN OIL-SOLUBLE COPOLYMER OF (1) A MONOVINYL-SUBSTITUTED VINYLPYRIDINE OF THE GROUP CONSISTING OF AN UNSUBSTITUTED VINYLPYRIDINE AND DERIVATIVES OF THE SAID VINYLPYRIDINE HAVING A LOWER ALKYL GROUP SUBSTITUTED ON A RING CARBON ATOM, (2) A MIXTURE OF A STEARYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID AND A LAURYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN THE MOL RATIO VARYING FROM 1:4 TO 4:1, RESPECTIVELY, AND (3) AC1-4 ALKYL ESTER OF AN ACRYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID IN AN AMOUNT OF FROM 10 TO 60 MOL PERCENT OF THE ESTER MIXTURE OF (2), THE MOL RATIO OF (1) AND THE ESTER MIXTURE OF (2) AND (3) VARYING FROM 1:2 TO 1:10 RESPECTIVELY SAID POLYMER HAVING AN AVERAGE ALKYL CHAIN LENGHT OF FROM C12 TO C14 CARBON ATOMS, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 5X10**4 TO 2.5X10**6
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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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |