Appeal No. 1998-3145
Application 08/432,285
The appellants’ specification indicates that the basic
and novel characteristics of their process and coating
composition are low color value, high light and color
stability, and comparatively low viscosity of the
polyisocyanate (page 3, line 28 - page 4, line 2). Verheist
indicates that the basic and novel characteristic of his
polyisocyanates is their usefulness
for making flexible foams having low density, high resilience
and high tear strength (page 2, lines 47-50). Windemuth
indicates that the basic and novel characteristic of his
process is the production of allophanate polyisocyanates which
are free of secondary products having isocyanurate structures
(col. 1, lines 15-21). Windemuth discloses a low viscosity of
his polyisocyanates (examples 3, 5, 7 and 8), but neither
Windemuth nor Verheist mention the color value and light and
color stability of their polyisocyanates.
The examiner does not argue that the applied references
indicate that the aromatically bound isocyanates in the
polyisocyanate of each reference would not materially affect
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