Appeal No. 1996-0047
Application No. 08/047,758
DECISION ON APPEAL
This is a decision on an appeal from the examiner’s final
rejection of claims 1 through 33 which are all of the claims
pending in the application.
Claim 1 is representative of the subject matter on appeal
and reads as follows:
1. An oil soluble dispersant mixture useful as an oil
additive comprising:
(A) from about 10 to 90 weight percent of a first
dispersant comprising a first hydrocarbyl substituted
monocarboxylic acid producing material formed by reacting a
first olefin polymer of C to C monoolefin having a number2 10
average molecular weight of about 1500 to 5,000 and a first
monounsaturated mono acid material selected from the group
consisting of acrylic acid, methacrylic acid, crotonic acid,
and cinnamic acid,, said first acid producing material having
an average of 1.05 to 1.25 monocarboxylic acid producing
moieties, per molecule of said first olefin polymer present in
the reaction mixture used to form said first acid producing
material, and (b) a first nucleophilic reactant selected from
the group consisting of amines, alcohols, amino-alcohols and
mixtures thereof; and
(B) from about 90 to 10 weight percent of a second
dispersant comprising a second hydrocarbyl substituted
monocarboxylic acid producing material formed by reacting a
second olefin polymer Of C to C monoolefin having a number2 10
average molecular weight of about 700 to 1150 and a second
monounsaturated mono acid material selected from the group
consisting of acrylic acid, methacrylic acid, crotonic acid,
and cinnamic acid, said second acid producing material having
an average of 1.2 to 2.0 monocarboxylic acid producing
3
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