In re Wenzel

This is an appeal from a decision of the Board of Appeals of the United States Patent Office, affirming a decision of the examiner rejecting claims 18, 19, 20, and 22 of appellant’s application for lack of invention over the cited prior art. Certain claims were allowed by the examiner. Appellant’s application was filed on December 6, 1929.

Claim 18 is illustrative of the subject-matter involved and reads; as follows:

18. The method of insulating walls, ceilings and the like which consists in diffusively spraying into the space therein a substantially dry flocculent material, and floating the…