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:
Mar. 19, 2013
Filed:
Jun. 11, 2012
Hong-zhi Tang, Glen Allen, VA (US);
Mark T. Devlin, Richmond, VA (US);
Naresh Mathur, Midlothian, VA (US);
Lee D. Saathoff, Glen Allen, VA (US);
Timothy J. Henly, Maidens, VA (US);
Hong-Zhi Tang, Glen Allen, VA (US);
Mark T. Devlin, Richmond, VA (US);
Naresh Mathur, Midlothian, VA (US);
Lee D. Saathoff, Glen Allen, VA (US);
Timothy J. Henly, Maidens, VA (US);
Afton Chemical Corporation, Richmond, VA (US);
Abstract
A dispersant additive composition, a lubricant composition containing the dispersant additive, a transmission containing the dispersant additive, and a method of providing a versatile lubricating fluid. The dispersant includes a reaction product of a hydrocarbyl substituted carboxylic acid or anhydride and an amine. The reaction product has a nitrogen content up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0:1 to about 0.8:1. The dispersant additive composition is effective to provide an electrical conductivity to a lubricant composition containing the dispersant additive composition and a metal detergent of less than about 1700 pS/m.