Application of Fritz Hostettler and William R. Proops

LANE, Judge.

This appeal is from the decision of the Patent Office Board of Appeals affirming the rejection of claims 1-3, 9 and 10 of application serial No. 509,427, filed November 23, 1965, 1 for “Stabilized Polyurethane Composition.” We affirm.

The invention relates to a method of stablizing certain foamed polyurethane compositions against oxidative degradation occurring at elevated temperatures, as reflected in representative claim 1:

1. In a method for preparing urethane foams wherein a polyether polyol having a molecular weight of at least 250 and containing at least two active hydrogens…