Appeal No. 94-3371
Application 07/986,878
diallylamine and “any other basic amino-nitrogen compound
including ... secondary ... amines ...” (col. 3, lines 40-49).
According to Nadler, the oil solution is mixed with an isocyanate
concentrate (crude reaction mixture) and then the mixture is
heated to an elevated temperature to distill and recover
isocyanate monomer from the concentrate (col. 1, line 70 to col.
2, line 38 and col. 2, line 60-66). In view of these teachings,
we find that Nadler would have suggested to one having ordinary
skill in the art the dispersants and the process claimed by
appellants in claims 2-9 and 73.
Appellants argue Nadler’s process differs from the claimed
process in that Nadler is using addition type copolymer
polyacrylate or polymethacrylates. As discussed supra, Nadler
discloses compounds other than alkyl acrylates or methylacrylates
such as unsaturated dicarboxylic acid derivatives, which
compounds come within the scope of appellants’ claimed (A-2-b-1)
substituted carboxylic acid component. By the same token, the
amine component of Nadler’s dispersant is not limited to
compounds such as beta-diethylaminoethyl methacrylate. A
secondary amine such as diallylamine is also suggested. We find
that the teachings of Nadler would have suggested to one of
ordinary skill in the art reacting an amine such as diallylamine
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