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:
Sep. 14, 2010
Filed:
Oct. 26, 2005
Mark F. Wilkes, Belper, GB;
Mark C. Davies, Belper, GB;
Mark F. Wilkes, Belper, GB;
Mark C. Davies, Belper, GB;
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
The present invention provides a method of asphaltene control in a hydrocarbon fluid, the method employing a composition comprising: a dispersant of formulae (I) or (II), including salts thereof, wherein T or T' is hydrogen or a polymerizing terminating group; A is Calkylene or alkenylene group; B is Calkylene or alkenylene group; Z and Z′ are the residue of a polyamine or polyimine; n is 2 to 50; m is 0 to 25; p and p′ are 2 or more, in one embodiment not greater than 2000 and in another embodiment not greater than 1000; A′ is Calkylene or alkenylene group; n′ is 2 to 10; and the weight ratio of T-(O-A-CO)(O—B—CO)to Z or T′-(O-A′-CO)to Z′ is at least 5:1.