The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 1992
Filed:
Jun. 01, 1989
Glen P Fetterman, Jr, Morris Plains, NJ (US);
Alan A Schetelich, Scotch Plains, NJ (US);
Exxon Chemical Patents Inc., Linden, NJ (US);
Abstract
In accordance with the present invention, there are provided low sulfated ash lubricating oil compositions which copmrise an oil of lubricating viscosity as the major component and as the minor component (A) at least about 3 wt % of at least one ashless nitrogen- or ester-containing dispersant, (B) at least about 2 wt % of at least one sulfurized alkyl phenol, and (C) at least one metal dihydrocarbyl dithiophosphate wherein the hydrocarbyl groups contain an average of at least 6 carbon atoms, and wherein the lubricating oil is characterized by a total sulfated ash (SASH) level of from 0.01 to about 0.6 wt % and by a SASH:dispersant wt:wt ratio of from about 0.01 to about 0.2:1.