In re Davis

.Graham, Presiding Judge,

delivered the opinion of the court:

The appellant made application to. the United States Patent Office for a patent for a certain alleged new and useful improvement in *705gypsum lumber. The application was for a reissue. Claims 1 to 10, being claims of the original patent, were allowed, while the remainder of the claims, 11 to 22, inclusive, were denied by both the examiner and the Board of Appeals.

The appellant has appealed from the decision of the board, as to all of said rejected claims.

The subject matter of the application is a so-called improvement in slabs for…