Appeal No. 98-0192 3
Application No. 08/572,281
least one ceramic part which requires lubrication, which operates at a temperature of at
least 250/C at the top ring reversal position, or which is powered by natural gas,
comprising supplying to such an engine a lubricant composition comprising:
(a) a major amount of an oil of lubricating viscosity, and
(b) a minor amount of a salt of an alkylene-linked polyaromatic molecule, the
aromatic moieties of which comprise at least one hydrocarbyl-substituted phenol and at
least one carboxy phenol, said salt being soluble in the oil of lubricating viscosity at the
operating temperature of the engine.
THE REFERENCES OF RECORD
As evidence of obviousness, the examiner relies upon the following references.
Blystone et al. 5,356,546 Oct. 18, 1994
Bardasz et al. 5,458,794 Oct. 17, 1995
(filed Sept. 30, 1993)
THE REJECTIONS
Claims 1 through 69 stand rejected under 35 U.S.C. § 103(a) as being
unpatentable over Blystone alone or in combination with Bardasz.
OPINION
We have carefully considered all of the arguments advanced by appellants and the
examiner and agree with the examiner that the aforementioned rejection of claims 1
through 66 and 69 under 35 U.S.C. § 103(a) is well founded. Accordingly, we sustain
this rejection. We agree with the appellants that the aforementioned rejection of claims
67 and 68 under 35 U.S.C. § 103(a) is not well founded. Accordingly, we do not
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