Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic compound containing boron
Reexamination Certificate
2011-01-18
2011-01-18
Griffin, Walter D (Department: 1797)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic compound containing boron
C508S363000, C508S369000
Reexamination Certificate
active
07871966
ABSTRACT:
The present invention provides a lubricating oil composition, which is capable to maintain sufficient low-friction (i.e. fuel saving performance) even when the lubricating oil is contaminated with soot and metal abrasion powder, which is excellent in durability with regard to anti-wear property and detergency, as well as oxidation stability, and which is capable to lower the ash content and to sufficiently maintain the performance of exhaust-gas after-treatment device for a long term. The lubricating oil composition comprises a lubricant base oil containing a base oil (X) of which % CPis 70 or more, % CAis 1 or less, viscosity index is 115 or more, and CCS viscosity at −35° C. is 3000 mPa·s or less, wherein the lubricant base oil, to total mass of the composition, contains following components (A)˜(D):(A) 0.01˜10 mass % of ashless friction modifier;(B) 0.01˜0.2 mass % of phosphorus-containing anti-wear agent as phosphorous content;(C) 0.01˜1 mass % of metallic detergent as metal content; and(D) 0.01˜0.4 mass % of ashless dispersant having 3000˜20000 of weight-average molecular weight as nitrogen content.
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Campanell Frank C
Griffin Walter D
Ladas & Parry LLP
Nippon Oil Corporation
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