Appeal 2007-0618
Application 10/618,936
OPINION
We determine the following factual findings from the record in this
appeal:
(1) claim 1 on appeal requires a completely or partially hydrolyzed
vinyl ester copolymer having a 75-100 mol% degree of hydrolysis
obtained by free radical polymerization of at least three
monomers, including a vinyl ester of C1 to C18 carboxylic acids, a
1-alkylvinyl ester of C1 to C6 carboxylic acids, and a silane-
containing, ethylenically unsaturated monomer (see claim 1 on
appeal; Reply Br. 4);
(2) Schilling is directed to an improved cobinder for a coating slip
composition, where the cobinder polymer comprises (a) vinyl
alcohol units; (b) 1-alkylvinyl alcohol units; (c) optionally vinyl
acylate units; (d) optionally allyl alcohol units; and (e) optionally
“other polymerizable monomers” (col. 2, ll. 35-48);
(3) Schilling teaches a two-stage process, using free radical
polymerization followed by hydrolysis (col. 3, ll. 22-44);
(4) Schilling exemplifies the incorporation of only two types of “other
polymerizable monomers,” namely vinyl esters of increased
hydrophobia such as vinyl fatty acid esters or ethylene (col. 3, l.
57-col. 4, l. 2);
(5) Schilling teaches that polyvinyl alcohol cobinders have excellent
pigment-binding power and support effect for optical brighteners,
but an object of the invention is to overcome the water solubility
and “pigment-shock” disadvantages (col. 2, ll. 7-31);
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