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. 08, 1991
Filed:
Dec. 07, 1989
Applicant:
Inventors:
Laurent Germanaud, Heyrieux, FR;
Nguyen Truong-Dinh, Vallauris, FR;
Gilbert Marie, Pau, FR;
Patrick Turello, Francheville, FR;
Assignee:
Societe Nationale Elf Aquitaine, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 / ; 5253276 ; 525375 ;
Abstract
The invention relates to additives to lubricants resulting from the condensation of a primary or secondary amine and/or of an alkylene polyamine with a copolymer containing vicinal carboxylic groups. Derivatives of phenothiazine, or naphthylamine and of diphenylamine are employed in most cases as alkylene polyamine. These compounds can be employed as multifunctional additives to lubricants.