Patent · US Active

Lubricating oil compositions

US7906469B2 · kind B2 · utility

4Cited by

0References

10Claims

0Family size

Assignee

Infineum International Limited · GB

Inventors

Stephen Arrowsmith · Woodstock, GB
Matthew Irving · Abingdon, GB

Key dates

Filing date	Nov 29, 2005
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Jan 3, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2040/25
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Lubricating oil compositions having a sulfated ash content of no more than 1.0 mass %, which contain a major amount of oil of lubricating viscosity, a minor amount of calcium salicylate detergent, an amount of a magnesium-based detergent providing the lubricating oil composition with at least 200 ppm of magnesium, an amount of a sulfur-containing molybdenum compound providing the lubricating oil composition with at least 20 ppm of molybdenum, and at least one nitrogen-containing dispersant providing the lubricating oil composition with at least 0.9 mass % nitrogen, which compositions provide improved top ring wear protection in internal combustion engines.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.