Appeal No. 96-1952
Application No. 08/163,778
(Published Japanese Patent Application)
Claims 1 through 5 stand rejected under 35 U.S.C. § 103
as unpatentable over Farrar in view of Takeda, Suzuki or
Masano (Answer, page 3). We reverse this rejection for3
reasons which follow.
OPINION
Independent claim 1 on appeal recites a dispersant system
requiring a first dispersant polymer which is a copolymer of
DADMAC and a group of monomers including
dialkylaminoalkylacrylates having C to C quaternaries. The 6 20
second dispersant polymer required by claim 1 on appeal is a
copolymer composed of at least 20 mole% of cationic monomer
units of formula (II).4
3It should be noted that claim 5 depends upon claim 1 but
there is no antecedent basis in claim 1 for the word
"hydrophobic" as recited in line 2 of claim 5. It is also
noted that "C6 to C20" in line 2 of claim 3 should be "C to
6
C ". Upon return of this application to the examiner, these
20
errors should be corrected.
4The monomer units represented by formula (II) are
acrylates, (meth)acrylates, acrylamides, and (meth)acrylamides
with a quaternized aminoalkyl moiety. The quaternary groups
attached to the amino nitrogen are all C or less. See the
2
specification, pages 12-13.
3
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