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:
Jun. 30, 2015
Filed:
Feb. 26, 2014
Afton Chemical Corporation, Richmond, VA (US);
Kongsheng Yang, Glen Allen, VA (US);
William Y. Lam, Glen Allen, VA (US);
Afton Chemical Corporation, Richmond, VA (US);
Abstract
A lubricant additive composition, a method for reducing engine deposit formation and a method for improving emulsion stability of a lubricant composition. The lubricant additive composition includes (a) an organomolybdenum compound contributing from about 20 to no greater than 300 ppm by weight molybdenum to the lubricant composition based on a total weight of the lubricant composition containing the additive composition; (b) a boronated hydrocarbyl substituted succinimide dispersant; and (c) a reaction product of (i) a hydrocarbyl-dicarboxylic acid or anhydride, (ii) a polyamine, (iii) a dicarboxyl-containing fused aromatic compound, and (iv) a non-aromatic dicarboxylic acid or anhydride. The hydocarbyl group of the hydrocarbyl-dicarboxylic acid or anhydride has a number average molecular weight of greater than 1800 Daltons as determined by gel permeation chromatography. A weight ratio of (b) to (c) ranges from about 1:1 to about 4:1.