US2889282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Shell Development Co
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Filing: 1956-09-17
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Granted: 1959-06-02
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Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 Lyman E Lorensen
- 👤 Emmett R Barnum
- 👤 Zachar John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
C; C10; C10M; C10M149/00; C10M149/02; C10M149/10; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/06; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL AND A MINOR AMOUNT SUFFICIENT TO EFFECTIVELY DEPRESS THE POUR POINT OF THE OIL AND IMPROVE ITS DETERGENT PROPERTIES, OF AN OIL-SOLUBLE COPOLYMER OF (1) A MONOVINYL-SUBSTITUTED PYRIDINE OF THE GROUP CONSISTING OF PYRIDINES SUBSTITUTED ON ONE OF THE RING CARBONS WITH, AS THE SOLE SUBSITUTED SUBSTITUENT, A VINYL GROUP, AND DERIVATIVES OF THE AFORE-DESCRIBED VINYL PRYRIDINES HAVING A LOWER ALKYL GROUP SUBSTITUTED ON A RING CARBON ATOM AND (2) A MIXTURE OF A C16 ALKYUL ESTER OF AN ARCYLIC ACID OF THE GROUP CONSISTING OF ARYCLINE ACID AND METHACRYLIC ACID AND A C10 TO C20 ALKYL ESTER OF AN ARCYLIC ACID OF THE GROUP CONSISTING OF THE ARCYLIC ACID AND METHACYRLIC ACID IN MOLE RATIOS VARYING FROM 1:4 TO 4:1, SAID COPOLYMER HAVING THE MONOVINYL PYRIDINE AND THE COMBINED ARCYLIC ACID ESTERS IN A MOLE RATIO VARYING FROM 1:2 TO 1:10 RESPECTIVELY, AND A MOLECULAR WEIGHT FROM 5 X 104 TO 295 X 106.
Claim 2
Dependent Claim
169 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL AND A MINOR AMOUNT SUFFICIENT TO EFFECTIVELY DEPRESS THE POUR POINT OF THE OIL AND IMPROVE ITS DETERGENT PROPERTIES, OF AN OIL-SOLUBLE COPOLYMER OF (1) A MONOVINYL-SUBSTITUTED PYRIDINE OF THE GROUP CONSISTING OF PYRIDINES SUBSTITUTED ON ONE OF THE RING CARBONS WITH, AS THE SOLE SUBSITUTED SUBSTITUENT, A VINYL GROUP, AND DERIVATIVES OF THE AFORE-DESCRIBED VINYL PRYRIDINES HAVING A LOWER ALKYL GROUP SUBSTITUTED ON A RING CARBON ATOM AND (2) A MIXTURE OF A C16 ALKYUL ESTER OF AN ARCYLIC ACID OF THE GROUP CONSISTING OF ARYCLINE ACID AND METHACRYLIC ACID AND A C10 TO C20 ALKYL ESTER OF AN ARCYLIC ACID OF THE GROUP CONSISTING OF THE ARCYLIC ACID AND METHACYRLIC ACID IN MOLE RATIOS VARYING FROM 1:4 TO 4:1, SAID COPOLYMER HAVING THE MONOVINYL PYRIDINE AND THE COMBINED ARCYLIC ACID ESTERS IN A MOLE RATIO VARYING FROM 1:2 TO 1:10 RESPECTIVELY, AND A MOLECULAR WEIGHT FROM 5 X 104 TO 295 X 106.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |