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:
May. 24, 2016
Filed:
Dec. 19, 2012
William Raymond Ruhe, Jr., Benicia, CA (US);
Pritesh A. Patel, Novato, CA (US);
William Raymond Ruhe, Jr., Benicia, CA (US);
Pritesh A. Patel, Novato, CA (US);
Chevron Oronite Company LLC, San Ramon, CA (US);
Abstract
A reaction product, useful as a viscosity index improver in a lubricating oil, reacting: a) an oil soluble ethylene-alpha olefin copolymer comprising from 10 to less than 80 weight % ethylene and greater than 20 up to 90 weight % of at least one Cto Calpha olefin, having a number average molecular weight from 5,000 to 120,000 and grafted with 0.5 to 5 weight % of an ethylenically unsaturated acylating agent, with b) a hydrocarbyl substituted poly(oxyalkylene) monoamine of the formula: R—(O—CHR—CHR)x-A wherein: Ris a hydrocarbyl group having from 1 to 35 carbon atoms; Rand Rare each independently hydrogen, methyl, or ethyl and each Rand Rare independently selected in each —O—CHR—CHR— unit; A is amino, —CHamino or N-alkyl amino having 1 to 10 carbon atoms; and x is an integer from 2 to 45.