Patent · US Active

Lubricating oil compositions

US8709988B2 · kind B2 · utility

3Cited by

4References

19Claims

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	Apr 29, 2014
Priority date	—
Expiry date	Dec 15, 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 at least 200 ppm of magnesium, and a basic, low molecular weight, nitrogen-containing dispersant, which compositions provide improved top ring wear protection in internal combustion engines.

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