Antioxidant amines based on n-(4aniliophenyl) amides...

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Compound of indeterminate structure – prepared by reacting a...

Reexamination Certificate

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C508S248000, C508S251000, C508S256000, C508S261000, C508S376000, C508S454000, C508S551000, C508S555000, C544S035000, C544S038000, C544S102000, C544S347000, C546S102000, C564S193000, C564S194000, C564S196000, C525S326100, C525S375000, C525S379000

Reexamination Certificate

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06916767

ABSTRACT:
A composition of matter is disclosed wherein the composition comprises an N-aromatic substituted acid amide compound selected from the group consisting of compounds of formula (I) wherein A and B are independently selected alkylene groups; R1is selected from the group consisting of hydrogen, alkyl, alkylether, or ester; R2is hydrogen if R1is hydrogen; R2is an alkyl primary amine if R1is alkyl, alkylether, or ester; R3and R4are independently selected from the group consisting of hydrogen and alkyl; R5is a sterically hindered phenolic group of formula (II) or formula (III) wherein X is CH2, S, NH, or O; and m, n, and p are independently selected integers equal to 0 or 1. These compositions may be used as such or they may be bound to a polymer backbone via a linking moiety. In either case, they are useful as antioxidants, particularly in lubricating oil compositions

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