Appeal No. 98-0192 2
Application No. 08/572,281
composition. The composition comprises a major amount of oil of lubricating viscosity
and a minor amount of a salt of the reaction product of a hydroxy aromatic compound
and an aliphatic carbonyl carboxylic compound.
THE CLAIMS
Claims 1, 2, 16, 53 and 67 are illustrative of appellants’ invention and are
reproduced below.
Claim 1. A process for lubricating an engine which contains at least one ceramic part
which requires lubrication, comprising supplying to said part a lubricant composition
comprising:
(a) a major amount of an oil of lubricating viscosity, and
(b) a minor amount of a salt of the reaction product of (I) an aliphatic carbonyl
carboxylic compound and (ii) a hydroxyaromatic compound, at least a portion of the
molecules of which are alkyl-substituted, said salt being soluble in the oil of lubricating
viscosity at the operating temperature of the engine.
Claim 2. The process of claim 1 wherein the oil of lubricating viscosity is an ester.
Claim 16. The process of claim 15 wherein the alkyl phenol contains a tert-butyl group
in a position ortho to the hydroxy group.
Claim 53. A composition of matter comprising a salt of the reaction product of (I) an
aliphatic carbonyl carboxylic compound and (ii) a hydroxyaromatic compound containing
at least two hydrocarbyl substituents each having at least 4 carbon atoms, at least a
portion of the molecules of which are substituted with an alkyl group of at least 8 carbon
atoms, said hydroxyaromatic compound further containing a tertiary alkyl group in a
position ortho to the hydroxy group.
Claim 67. A process for lubricating an internal combustion engine which contains at
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Last modified: November 3, 2007