Appeal No. 1998-3118
Application No. 08/448,543
subject matter is adequately illustrated by independent claim 13 which reads as follows:
13. A composition of matter comprising a nonionic polyurethane consisting
essentially of the groups
(a) O-(CH CH O-) ;
2 2 n
(b) -CONH X NHCO-; and
(c) 0 to 40% by weight -O-Y-O- groups based on the weight of (a) + (c)
wherein Y is a hydrophobic moiety selected from the group consisting of (-CH -
2
CH(CH )- O) CH -CH-(CH ); (-CH CH(C H )--O) -CH -CH(C H )-,3 m 2 3 2 2 5 m 2 2 5
(-CH -CH -CH -CH O) -CH -CH .-CH CH , alkylene groups having from 2 to 44
2 2 2 2 m 2 2 2 2
carbon atoms and cycloalkylene groups having from 6 to 44 carbon atoms, wherein
X is a m-tetramethylxylene residue, n is a number of from 8 to 500 and m is a
number of from 8 to 500 wherein said nonionic polyurethane has a weight average
molecular weight of at least 10,000 and forms a homogeneous mixture with water,
said mixture having a specific viscosity of at least 0.4 when said nonionic
polyurethane is present at 1 % by weight of said mixture and when said mixture is at
20°C.
. The references relied upon by the examiner as evidence of obviousness are:
2
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