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:
Feb. 24, 1998
Filed:
Nov. 18, 1996
Applicant:
Inventors:
Henricus Paulus Tomassen, Amsterdam, NL;
Christinus Cornelis van de Kamp, Amsterdam, NL;
Marinus Johannes Reynhout, Amsterdam, NL;
Jian Lin, Maidstone, GB;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
508469 ; 526271 ; 526318 ;
Abstract
The present invention provides a copolymer of at least one n-(C.sub.8 -C.sub.30 -alkyl) (meth)acrylate with maleic anhydride, which contains alternating (meth)acrylate and maleic anhydride monomeric units, characterized in that the copolymer has a degree of alternation of at least 85%, a process for preparing the copolymer, a hydrocarbon oil composition containing the copolymer and the use of the copolymer as a flow improver additive.