Appeal No. 1997-1907 Page 9
Application No. 08/265,369
the polyisocyanate mixture of Example 1 together 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 with 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 do
not render appellants’ claimed composition and process of
making the same prima facie obvious.
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 which is formed from a
specified polyol, a specified compound containing a
hydrophillic center and diisocyanate, or suggested a
modification of the separately identified organic
polyisocyanate reactant (b) of Coogan in a manner so as to
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