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:
Dec. 14, 1993
Filed:
Nov. 25, 1991
Applicant:
Inventors:
Laurent Germanaud, Valentin le Fayet, FR;
Patrick Azorin, Mornant, FR;
Patrick Turello, Francheville, FR;
Assignee:
Elf France, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
252 47 ; 252 475 ; 252402 ; 544 31 ; 544 37 ; 544 38 ; 544 41 ;
Abstract
The present invention relates to the preparation of antioxidant additives to lubricants and to their use in lubricating compositions. The additives according to the invention have the formula: