JOHNSON, Judge.
This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the action of the Primary Examiner in finally rejecting claim 6 of appellants' application, Serial No. 91,226, for a patent on "Improvements in Method of Producing Penicillin." Claim 7, the only remaining claim in the application, was allowed by the examiner.
The appealed claim reads as follows:
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