Appeal No. 1996-0214
Application 07/755,603
claims 27, 30-33, 44, 45, 48, 56-58, 65-67, 71-86 and 88-90,
and refusal to allow claims 49 and 87 as amended after final
rejection. These are all of the claims remaining in the
application.
THE INVENTION
Appellants claim a lubricating oil composition which
includes a lubricating oil, a metal-containing detergent or
anti-rust additive, and an oil soluble dispersant which is the
oil soluble reaction product of a recited hydrocarbyl
substituted C to C dicarboxylic acid producing material and4 10
a specified basic reactant. Appellants also claim a method
wherein the above reaction product is included in an additive
concentrate. Claim 27 is illustrative and reads as follows:
27. A lubricating oil composition comprising (i) a
lubricating oil, (ii) a metal-containing detergent or anti-
rust additive and (iii) an oil soluble dispersant, the
dispersant comprising the oil soluble reaction product of a
reaction mixture comprising:
(a)a hydrocarbyl substituted C to C dicarboxylic acid4 10
producing material formed by reacting olefin polymer of C2
to C monoolefin having a number average molecular
10
weight of about 1500 to 5,000 and a C to C4 10
monounsaturated acid material, wherein said substituted
material is characterized by a functionality ratio of
from about 1.05 to 1.25 dicarboxylic acid producing
moieties per molecule of said olefin polymer used in the
2
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