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US3859221A
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Lubricant compositions exhibiting synergistic relief of metal fatigue
Assignee: Mobil Oil AS
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Filing: 1973-04-20
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Granted: 1975-01-07
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Expires: 1993-04-20
Abstract
Abstract Lubricant compositions are provided containing, in an amount sufficient to improve metal-fatigue, a synergistic mixture of (a) isopropylaminoethanol and (b) a reaction product of an alkenyl succinic anhydride and a polyethylene amine.
Inventors
- 👤 Conrad J Polk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:56
CPC Classifications
C; C10; C10M; C10M133/00; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/028; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/10; C10M2215/102; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10M2227/04; C10M2227/08; C10M2227/081; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR PROPORTION OF A LIQUID HYDROCARBON OIL SELECTED FROM THE GROUP CONSISTING OF MINERAL OILS, SYNTHETIC OILS AND GREASES THEREOF, CONTAINING, IN AN AMOUNT SUFFICIENT TO IMPROVE METAL FATIGUE, A SYNERGISTIC MIXTURE OF (A) ISOPROPYLAMINOETHANOL AND B AN ALKENYL SUCCINIME OF AN ALKENYL SUCCINIC ANHYDRIDE AND A POLYETHYLENE AMINE, IN A MOL RATIO OF ABOUT 2:1 AND IN A MOL RATIO OF (A) TO (B) FROM ABOUT 1:4 TO ABOUT 4:1.
Claim 2
Dependent Claim
76 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR PROPORTION OF A LIQUID HYDROCARBON OIL SELECTED FROM THE GROUP CONSISTING OF MINERAL OILS, SYNTHETIC OILS AND GREASES THEREOF, CONTAINING, IN AN AMOUNT SUFFICIENT TO IMPROVE METAL FATIGUE, A SYNERGISTIC MIXTURE OF (A) ISOPROPYLAMINOETHANOL AND B AN ALKENYL SUCCINIME OF AN ALKENYL SUCCINIC ANHYDRIDE AND A POLYETHYLENE AMINE, IN A MOL RATIO OF ABOUT 2:1 AND IN A MOL RATIO OF (A) TO (B) FROM ABOUT 1:4 TO ABOUT 4:1.
Claim 3
Dependent Claim
33 words
A lubricant composition as defined in claim 1 wherein said composition comprises a mineral oil of lubricating viscosity in the range from about 45 SSU at 100*F. to about 6,000 SSU at 100*F.
Claim 4
Dependent Claim
34 words
A lubricant composition as defined in claim 1 wherein said composition comprises a mineral oil of lubricating viscosity in the range from about 50 SSU at 210*F. to about 250 SSU at 210* F.
Claim 5
Dependent Claim
33 words
A lubricant composition as defined in claim 1 wherein said synergistic mixture is present in an amount from about 0.01 to about 10%, by weight, of the total weight of the lubricant composition.
Claim 6
Dependent Claim
33 words
A lubricant composition as defined in claim 1 wherein said synergistic mixture is present in an amount from about 0.1 to about 2%, by weight, of the total weight of the lubricant composition.
Claim 7
Dependent Claim
17 words
A lubricant composition as defined in claim 1 wherein said alkenyl succinic anhydride is polyisobutenyl succinic anhydride.
Claim 8
Dependent Claim
14 words
A lubricant composition as defined in claim 1 wherein said polyethylene amine is tetraethylenepentamine.
Claim 9
Dependent Claim
42 words
A synergistic mixture of (a) isopropylaminoethanol and (b) an alkenyl succinimide of an alkenyl succinic anhydride and a polyethylene amine, in a mol ratio of about 2:1 and in a mol ratio of (a) to (b) from about 1:4 to about 4:1.
Claim 10
Dependent Claim
42 words
A synergistic mixture of (a) isopropylaminoethanol and (b) an alkenyl succinimide of an alkenyl succinic anhydride and a polyethylene amine, in a mol ratio of about 2:1 and in a mol ratio of (a) to (b) from about 1:4 to about 4:1.
Claim 11
Dependent Claim
17 words
A synergistic mixture as defined in claim 8 wherein said alkenyl succinic anhydride is polyisobutenyl succinic anhydride.
Claim 12
Dependent Claim
14 words
A synergistic mixture as defined in claim 8 wherein said polyethylene amine is tetraethylenepentamine.
References Cited (Backward Citations)
US3219666A
Cited
US3280029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |