US3844960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant compositions
Assignee: Shell USA Inc
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Filing: 1970-11-06
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Granted: 1974-10-29
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Expires: 1990-11-06
Abstract
Abstract Lubricant compositions comprising: A. LUBRICATING OIL BASE B. REACTION PRODUCT OF ALKENYL SUCCINIMIDE AND DIALKYLDITHIOPHOSPHATE ACID ESTER 0.05-10 PERCENT C. TETRAALKYLTRITHIOPYROPHOSPHATE 0.001-2 PERCENT AND OPTIONALLY D. ALKENYL SUCCINIMIDE 0.05-10 PERCENT.
Inventors
- 👤 W Breitigam
- 👤 B Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/047
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
AN ASHLESS LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL WHICH IS A NEUTRAL HYDROCARBON OIL WITH A VISCOSITY INDEX OF AT LEAST 70 AND A. FROM ABOUT 0.05 TO 10 PERCENT BY WEIGHT OF A REACTION PRODUCT OF POLYISOBUTENYL SUCCINIMIDE OF TETRAETHYLENEPENTAMINE WHEREIN THE SUCCINIMIDE HAS AN AVERAGE MOLECULAR WEIGHT BETWEEN 400-3,000 AND DI-2-ETHYLHEYLDITHIOPHOSPHORIC ACID, SAID REACTION BEING CARRIED OUT BY HEATING AN EQUIVALENT WEIGHT OF EACH EACTANT AT A TEMPERATURE OF ABOUT 80*-120*C AND UTILIZING SAID PRODUCT WITHOUT FURTHER PURIFICATION AND B. FROM ABOUT 0.001 TO 2 PERCENT BY WEIGHT OF TETRA 2ETHYLHEXYLTRIHIOPYROPHOSPHATE.
Claim 2
Dependent Claim
98 words
AN ASHLESS LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL WHICH IS A NEUTRAL HYDROCARBON OIL WITH A VISCOSITY INDEX OF AT LEAST 70 AND A. FROM ABOUT 0.05 TO 10 PERCENT BY WEIGHT OF A REACTION PRODUCT OF POLYISOBUTENYL SUCCINIMIDE OF TETRAETHYLENEPENTAMINE WHEREIN THE SUCCINIMIDE HAS AN AVERAGE MOLECULAR WEIGHT BETWEEN 400-3,000 AND DI-2-ETHYLHEYLDITHIOPHOSPHORIC ACID, SAID REACTION BEING CARRIED OUT BY HEATING AN EQUIVALENT WEIGHT OF EACH EACTANT AT A TEMPERATURE OF ABOUT 80*-120*C AND UTILIZING SAID PRODUCT WITHOUT FURTHER PURIFICATION AND B. FROM ABOUT 0.001 TO 2 PERCENT BY WEIGHT OF TETRA 2ETHYLHEXYLTRIHIOPYROPHOSPHATE.
Claim 3
Dependent Claim
20 words
The composition of claim 1 having additionally from 0.05 to 10 percent by weight of a polyisobutenyl succinimide of tetraethylenepentamine.
References Cited (Backward Citations)
US2063629A
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US3470270A
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US3185643A
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US3185645A
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US3502677A
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US3428563A
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US3687848A
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |