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:
Dec. 10, 1985
Filed:
Jul. 13, 1984
Applicant:
Inventor:
Rudolf J Eckert, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C10M / ; C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 / ; 252 50 ; 525153 ; 525154 ; 525280 ;
Abstract
A process for the preparation of an oil-soluble, star-shaped product having viscosity index-improving and dispersant properties, comprising modifying a hydrogenated star-shaped polymer wherein said arms are hydrogenated homopolymers and copolymers of conjugated dienes and mono-alkenyl arenes, and wherein the hydrogenated polymer is metallated with an organolithium compound in the presence of a metallation promoter, and subsequently reacted with a vinyl pyridine or a carbonyl group containing organic compound.