JACKSON, Associate Judge.
The Board of Appeals of the United States Patent Office affirmed a decision of the Primary Examiner rejecting, in view of the prior art, claims 2, 4, 5, 15 and 16 of an application for a patent for "Method of Bleaching Barytes." Six claims were allowed. From the decision of the board this appeal was taken.
The references cited are:
Ebers, 1,709,612, April 16, 1929;
De Lore et al., 1,783,778, December 2, 1930;
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