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:
Nov. 03, 1992
Filed:
May. 22, 1991
Theodore E Nalesnik, Wappingers Falls, NY (US);
Maria M Kapuscinski, Carmel, NY (US);
Texaco Inc., White Plains, NY (US);
Abstract
An additive reaction product prepared by the steps comprising reacting a copolymer selected from the group consisting of ethylene copolymers prepared from ethylene and at least one C.sub.3 -C.sub.10 alpha-monoolefin and, optionally, a polyene selected fron non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 -C.sub.10 alpha-monoolefin, and from about 0 to 15 mole percent of said polyene and block copolymers prepared from styrene and a diene monomer having from 4 to 6 carbon atoms, said copolymer being a number average molecular weight ranging from about 25,000 to 300,000, with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function with their structure; reacting said reaction intermediate in with an unsaturated hydrocarbyl amine to form an imide reaction product; and reacting said imide reaction product with a nitroso compound, and a lubricating oil compositon containing same.