WORLEY, Chief Judge.
This is an appeal from the decision of the Board of Appeals affirming the Primary Examiner's rejection of claims 1, 3, 7 and 8 in appellants' application
Kreimeier et al. 2,116,867 May 10, 1938. Four claims directed to the method of making the derivatives were allowed by the examiner.
Claim 1 is representative and reads:
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