In re D'Ancicco

Baldwin, Judge.

This appeal is from the decision of the Patent Office Board of Appeals which sustained the rejection of claims 9 and 10 of appellants’ application1 as unpatentable under 35 USC103.

*749 The Invention

The claims on appeal are directed to rigid polyurethane foams made by reacting particular mixtures of polyisocyanates with a polyol which has a high hydroxy number. The polyol may be either a polyester or a polyether polyol. Claim 10 is representative of the claims on appeal and reads as follows (paragraphing ours) :

A strong, rigid polyurethane foam characterized by great mechanical…