Patent · US Expired

Lubricating oil compositions

US6423670B2 · kind B2 · utility

14Cited by

27References

9Claims

0Family size

Assignee

Infineum International Limited · GB

Inventors

Christopher Locke · Shrewsbury, GB
Isabel P. MacDonald · Wantage, GB

Key dates

Filing date	Mar 14, 2001
Grant date	Jul 23, 2002
Priority date	—
Expiry date	Mar 14, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2040/253
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A heavy duty diesel engine lubricating oil composition having no more than 0.10 wt. % phosphorus comprises an ashless dispersant, a neutral calcium phenate, an overbased calcium or magnesium sulfonate, a metal dihydrocarbyldithiophosphate, and a phenolic or aminic antioxidant.

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