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:
Sep. 08, 1987
Filed:
Dec. 18, 1985
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 50 ; 252 / ; 546152 ; 546166 ; 546178 ;
Abstract
Lubricants can be rendered more resistant to oxidation with the aid of compounds of the formula I ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, alkyl or benzyl, R'.sub.2 is hydrogen or alkyl, R.sub.3 and R.sub.4 are independently alkyl, phenyl or benzyl, R.sub.5 is hydrogen or alkyl, and R.sub.6 is alkyl. In a preferred embodiment, these compounds are combined with a customary phenolic antioxidant.