Appeal No. 1997-2384 Page 8
Application No. 08/430,083
with 2,2-bis-(hydroxymethyl)-propionic acid (DMPA) and N-
methyl pyrrolidone (NMP).
From our perspective, the particularly identified and
isolated teachings of Mosbach, regarding the use of an
isocyanate dimer in a polyisocyanate mixture that is dispersed
in water and used as a coating film, and the teachings of
Coogan, regarding the formation of a water dispersible
polyurethane made from a water-dispersible polyurethane
prepolymer, an organic polyisocyanate and a chain extender,
taken together with the examiner’s obviousness statements are
not sufficient to establish the prima facie obviousness of
appellants’ method. This is so since the examiner has not
particularly addressed how the teachings of Mosbach regarding
particular polyisocyanate mixtures would have suggested a
modification of the prepolymer reactant of Coogan in a manner
so as to necessarily result in the herein claimed process
including the formation of appellants’ coating composition
upon reaction. In this regard, the examiner has not
adequately explained how the furnished evidence would have led
one of ordinary skill in the art to modify the diisocyanate
reactants of Coogan based on the teachings of Mosbach that
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