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:
Apr. 11, 2000
Filed:
Dec. 01, 1998
Applicant:
Inventors:
Irwin A Wiehe, Gladstone, NJ (US);
Ramesh Varadaraj, Flemington, NJ (US);
Torris G Jermansen, Far Hills, NJ (US);
Raymond J Kennedy, Hampton, NJ (US);
Cornelius H Brons, Washington, NJ (US);
Assignee:
Exxon Research and Engineering Co., Florham Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
516 20 ; 516909 ; 562 45 ; 562 88 ; 562 91 ; 106278 ; 208 / ; 208265 ; 208282 ;
Abstract
The present invention is an asphaltene dispersant containing an aromatic, a sulfonic acid head, and an alkyl tail containing 16 carbons or more and at least one branch of a methyl or longer alkyl. Preferably, the aromatic is a fused two ring aromatic and the tail is a two, branched alkyl tail of 30 carbons or longer.