Appeal No. 2001-0061 Page 2
Application No. 08/720,851
is obtained in the absence of (b). Further details of this appealed subject matter are set
forth in representative independent claim 1, which reads as follows:
1. A composition comprising an aqueous dispersion comprised of:
(a) a first cationic water-soluble or water-swellable polymer; and
(b) at least one second water-soluble polymer different from said first polymer;
and
(c) a kosmotropic salt; and
(d) a chaotropic salt,
wherein the amounts of said (b), (c) and (d) are such that a homogeneous
composition is obtained in the absence of said (b), and wherein the amounts of
said (c) and (d) are effective to reduce the bulk viscosity of said aqueous
dispersion.
The reference relied upon by the examiner as evidence of obviousness is:
Ramesh et al. (Ramesh) 5,597,858 Jan. 28, 1997
(filed Mar. 22, 1995)
The references relied upon by the appellants as evidence of non-obviousness
are:
Takeda et al. (Takeda ‘590) 5,006,590 Apr. 9, 1991
Takeda et al. (Takeda ‘655) 4,929,655 May 29, 1990
All of the appealed claims stand rejected under 35 U.S.C. § 103(a) as being
unpatentable over Ramesh.
We refer to the Brief and Reply Brief and to the Answer for a complete exposition
of the opposing viewpoints expressed by the appellants and by the examiner
concerning the above noted rejection.
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