Appeal No. 96-2898
Application No. 08/340,998
A) an esterified styrene-maleic anhydride copolymer wherein
the number of repeating units ranges from about 60 to about
400, and wherein said polymer is a reaction product of a
styrene-maleic anhydride copolymer and a mixture of C -C
20 28
linear alcohols and C alcohol wherein the alcohols are in a 3
22
to 1 ratio for C -C linear alcohols to C alcohol; and B) an20 28 22
esterified alpha-olefin maleic anhydride copolymer wherein the
number or repeating units ranges from about 20 to about 220,
and wherein the alpha-olefin maleic anhydride copolymer is the
reaction product of maleic anhydride and an alpha-olefin
having 6 to 36 carbon atoms, and wherein the esterified alpha
olefin-maleic anhydride copolymer is a reaction product of an
alpha olefin-maleic anhydride copolymer and one or more
alcohols having from about 9 to about 18 carbon atoms in a
ratio of about 3 to 1 to about 1 to 3 of either esterified
copolymer to the other esterified copolymer.
35. A lube oil composition comprising:
a naphthenic lube oil displaying a wax haze at room
temperature and a quantity of an additive sufficient to
reduce the haze, said additive comprising a mixture of an
esterified styrene-maleic anhydride copolymer and an
esterified alpha-olefin maleic anhydride copolymer in a ratio
of about 1 to 3 and about 3 to 1 of either copolymer to the
other copolymer.
The references of record relied upon by the examiner are:
Gee et al. (Gee) 3,574,575 April 13, 1971
Bridger 4,548,725 October 22,
1985
The appealed claims stand rejected under 35 U.S.C. § 103
in view of Gee and Bridger.
We affirm.
The subject matter on appeal is directed to an additive
composition for reducing the pour point and wax haze in a
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