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. 23, 1978
Filed:
Jun. 16, 1975
Applicant:
Inventor:
Donald Irvin Hoke, Chagrin Falls, OH (US);
Assignee:
The Lubrizol Corporation, Wickliffe, OH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 / ; 2605 / ;
Abstract
Amides of alkyl-substituted hydroxyaromatic carboxylic acids (especially alkyl-substituted salicylic acids) and the like, in which the alkyl substituent contains at least about 10 carbon atoms, are useful as dispersant additives for lubricants and fuels. Particularly useful are salicylamides in which the substituent is derived from propylene, 1-butene or isobutene and has a molecular weight of about 150-1750, and in which the amide moiety is derived from an alkylene polyamine. Such amides are preferably prepared by the reaction of the corresponding nitrogen-containing compound with a vic-hydroxyalkyl ester of the salicylic acid.