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:
Oct. 10, 1989
Filed:
Nov. 16, 1987
Applicant:
Inventors:
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 325 ; 252 / ; 252 475 ; 252 496 ; 252 498 ; 252 / ; 252 / ;
Abstract
A lubricating composition comprising a major portion of a lubricating oil and a minor portion of an alkyl or alkenyl-substituted succinimide, which succinimide is the reaction product of a polyamine with 3 to 25 carbon atoms, such has been selected from linear and branched alkylene polyamines, cycloaliphatic polyamines and heterocyclic polyamines, and an alkyl or alkenyl-substituted succinic anhydride, in which the alkyl or alkenyl moiety has a number average molecular weight from 600 to 1300 and in which the average number of succinic groups per alkyl or alkenyl group is between 1.4 and 4.0.