In re Krodel

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the holding of the Primary-Examiner rejecting, as unpatentable over the prior art and as functional, claims 18 and 19, the only remaining claims in appellants’ application for a patent for a “Process for De-inlring Printed Waste Paper.”

The appealed claims read as follows:

18. The process of de-inking printed material which comprises forming an aqueous slurry of printed and shredded waste newsprint stock material, [then adding to the slurry a water soluble salt yielding an ion having a…