SMITH, Judge.
Claims 2, 3, 6 and 7 of appellant's application
Utzman 1,383,249 June 28, 1921 Dalzell 2,054,246 Sept. 15, 1936
In the context of this case, the rejection appears to be based on 35 U.S.C. § 103 and we shall so treat it.
The invention in issue is claimed in two aspects. As a particular gypsum...
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