Trunk piston engine lubricating oil compositions
US9206374B2 · kind B2 · utility
2Cited by
28References
19Claims
0Family size
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Key dates
| Filing date | Dec 16, 2011 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Jan 31, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/252
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a trunk piston engine lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity; (b) one or more carboxylate-containing detergents comprising a salt of an alkyl-substituted hydroxyaromatic carboxylic acid, wherein at least about 50% of the alkyl moiety of the alkyl-substituted hydroxyaromatic carboxylic acid comprises C26+ alkyl groups derived from one or more normal alpha olefins; and (c) one or more zinc dithiophosphates in an amount of about 0.02 to about 0.12 wt. % in terms of phosphorus content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.