Application of William J. Krodel and Norman Hackerman

JOHNSON, Judge.

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-inking 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…