BLAND, Associate Judge.
The invention involved in this appeal from a decision of the Board of Appeals of the Patent Office, which affirmed the action of the Examiner in rejecting appellants' claims 7 and 8, relates to a process for the preparation of feldspathic flux for porcelain. Claims 7 and 8 are as follows:
"7. The process of producing feldspathic flux for porcelain consisting in separately crushing different batches of feldspathic rock containing mica...
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