Appeal No. 2000-0836
Application No. 08/727,693
only consider claim 1 which is illustrative of appellants’
invention and which reads as follows:
1. A method comprising (a) intermixing an aqueous dispersion of
polymers, or aqueous admixture thereof, in an amount effective for
dewatering, with a suspension of dispersed solids, and (b)
dewatering said suspension of dispersed solids, said aqueous
dispersion being comprised of
(i) dispersed droplets comprised of a first cationic water-soluble
or water-swellable polymer having at least one recurring unit of
the formula (I),
wherein R1 is H or CH3, A is O or NH, B is an alkylene or branched
alkylene or oxyalkylene group having from 1 to 5 carbons, R2 is a
methyl, ethyl, or propyl group, R3 is a methyl, ethyl, or propyl
group, R4 is an alkyl group having from 1 to 10 carbons, or an
aryl, benzyl or C2H4C6H5 group, and X is a counterion, and R2, R3,
and R4 together contain a total of at least 4 carbon atoms; and
(ii) at least one second water-soluble polymer different from said
first polymer,
wherein a homogeneous composition is obtained in the absence of
said (ii).
Prior art references relied upon by the examiner on appeal
are:
2
Page: Previous 1 2 3 4 5 6 7 Next
Last modified: November 3, 2007