Appeal No. 1998-1664
Application No. 08/323,982
23. The overbased metal salt of claim 1 wherein
the metal ratio is at least about 1.5.
28. A lubricant comprising:
(a) an oil of lubricating viscosity, and
(b) an overbased metal salt of an acidic
material selected from the group consisting of
(i) hydrocarbyl-substituted carboxyalkylene-
linked phenols,
(ii) dihydrocarbyl esters of alkylene
dicarboxylic acids, the alkylene group being
substituted with a hydroxy group and an additional
carboxylic acid group, and
(iii) alkylene-linked polyaromatic molecules,
the aromatic moieties whereof comprise at least one
hydrocarbyl-substituted phenol and at least one
carboxy phenol;
the hydrocarbyl group or groups of said acidic
material being of sufficient length to provide oil
solubility to the salt;
wherein the overbased metal salt has a metal
ratio of at least 1.3.
As evidence of unpatentability, the examiner relies upon
the following prior art references:
Adams et al. (Adams) 5,281,346 Jan. 25,
1994
(filing date Apr. 16,
1992)
Blystone et al. (Blystone) 5,356,546 Oct. 18,
1994
(filing date Apr. 16,
1992)
The following grounds of rejection are presented for our
review in this appeal:
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