Appeal No. 1998-3229 Page 2
Application No. 08/575,976
shoe midsole made therefrom. An understanding of the
invention can be derived from a reading of exemplary claim 1,
which is reproduced below.
1. A process for the preparation of microcellular
polyurethane elastomers, comprising reacting:
a) an isocyanate component comprising in substantial part
one or more isocyanate-terminated prepolymers having a free
NCO group content of from about 6 to about 16 weight percent,
said prepolymers comprising the reaction product of a
stoichiometric excess of one or more di- or polyisocyanates
with a high molecular weight, high functionality
polyoxypropylene diol having a number average molecular weight
of about 3000 Da to about 10,000 Da and an actual
functionality of about 1.95 or more;
b) a polyol component comprising in substantial part one
or more aliphatic or cycloaliphatic chain extenders or mixture
thereof;
in the presence of
C) an amount of a blowing agent effective to provide a
microcellular elastomer density of from about 0.15 to about
0.6 g/cm .3
The sole prior art reference of record relied upon by the
examiner in rejecting the appealed claims is:
Hostettler 4,559,366 Dec. 17,
1985
Claims 1-20 stand rejected under 35 U.S.C. § 102(b) as
being anticipated by Hostettler.
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