Appeal No. 1998-3145
Application 08/432,285
groups and to a coating composition containing this
polyisocyanate.
Claims 1 and 5 are illustrative:
1. A process for the production of a polyisocyanate
containing allophanate groups and in which the isocyanate
groups consist essentially of aliphatically and/or
cycloaliphatically bound isocyanate groups which comprises
reacting an organic compound containing urethane groups with
an organic polyisocyanate containing aliphatically and/or
cycloaliphatically bound isocyanate groups in the presence of
a tin compound.
5. A coating composition comprising an isocyanate-
reactive component and the polyisocyanate prepared in
accordance with Claim 1.
THE REFERENCES
Windemuth et al. (Windemuth) 3,769,318 Oct. 30,
1973
Verheist et al. (Verheist) 0 393 903 Oct. 24,
1990
(European patent application)
THE REJECTION
Claims 1-8 stand rejected under 35 U.S.C. § 103 as being
unpatentable over Verheist in view of Windemuth.
OPINION
We reverse the aforementioned rejection.
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