Appeal No. 1997-3175
Application 08/521,545
references. Delfino discloses a polymeric mordant having
guanyl hydrazone salt moieties attached to a polymeric
backbone through -COO- or -COO-alkylene- linkages (abstract;
col. 7, lines 22-40). The teaching by Delfino relied upon by
the examiner (answer, pages 4-5) for linking the Farooq and
Breton references is the following (col. 7, lines 41-50):
The mordants useful in the present invention
can comprise units derived from copolymerizable
monomers, such as acrylates, acrylamides, vinyl
acetates, styrenes, vinyl-ethers, vinyl-ketones,
vinyl-alchols [sic], unsaturated chlorides and
nitriles, with the proviso that such copolymer units
be in such a quantity as not to modify the
characteristics of the mordants useful to the
purposes of the present invention; acceptable
quantities are for instance up to 20% by weight,
more preferably up to 10% by weight.
The examiner argues that Delfino would have indicated to one
of ordinary skill in the art that Farooq’s guanyl hydrazone
moieties could be attached to other polymers, provided that
Delfino’s proviso is met (answer, page 5). The examiner
interprets this proviso as requiring that the characteristics
of the mordant are not interfered with, and argues that
Breton’s polymer would meet this proviso because it is usable
in ink jet compositions (answer, page 10).
Delfino’s proviso, however, states that the copolymer
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