LENROOT, Associate Judge.
This is an appeal from a decision of the Board of Appeals of the United States Patent Office affirming a decision of the Primary Examiner rejecting claims 22, 23, and 33 of appellants' application for a patent filed on July 29, 1938. The claims read as follows:
"22. A process for treating textile material which comprises impregnating the material with a compound having the formula R. N=C=Y where R is an aliphatic radical containing...
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