BLAND, Associate Judge.
Appeal is taken to this court from the decision of the Board of Appeals of the United States Patent Office, affirming the action of the examiner in finally rejecting all the claims in the application which are:
"1. A carburizing material comprising coal-coke having an ash content of not over 8 per cent.
"2. A carburizing material comprising coal-coke having between 4 and 8 per cent. of ash content.
"3. A carburizing...
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