Appeal No. 1997-1907 Page 5
Application No. 08/265,369
Accordingly, we will not sustain the examiner's rejection, as
stated.
Coogan discloses a composition comprising an aqueous
dispersion of polyurethane and a method of making the same.
The composition is a product of the reaction of:3
(a) a water-dispersible isocyanate-terminated
polyurethane prepolymer having an NCO content of 2.1
to 10% percent by weight,
(b) an organic polyisocyanate having an average
isocyanate functionality of 2.1 to 4.0, and
(c) an active hydrogen-containing chain extender.
The prepolymer reactant of Coogan is disclosed as being
made from an organic diisocyanate, a polyol having a specified
molecular weight range and a specified compound having a
hydrophillic center (column 2, lines 12-19). Coogan (column
2, lines 31-35) further teaches that mixtures of
polyisocyanates may be used and a variety of modified
polyisocyanates that have “... urethane, allophanate, urea,
biuret, carbodimide, uretonimine or isocyanurate residues”
introduced therein are useful in making the prepolymer.
rejecting claims under 35 U.S.C. § 103. See In re Rijckaert,
9 F.3d 1531, 1532, 28 USPQ2d 1955, 1956 (Fed. Cir. 1993).
3Coogan, column 2, lines 6-11.
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