In re Tanczyn

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the final rejection by the *765Primary Examiner of the single remaining claim of appellant’s application for a patent on a manganese-nitrogen pre-alloy, on the ground of lack of invention over the prior art. The claim reads:

9. Nitrided electrolytic manganese plates of about one-sixteenth inch thickness and containing 2% to 7% nitrogen and the remainder substantially all manganese.

The refer fences relied upon are:

Weitzenkorn et al., 2,454,020, November 16, 1948.

Metals and Alloys, April 1944,…