LUHRING, Justice.
The plaintiffs seek the issuance of a patent pursuant to the provisions of 35 U.S.C. § 63, 35 U.S.C.A. § 63, for an "abrasive article and method of making the same."
The claims in issue are numbered respectively 3, 5, 11, 12, 13, 14, 15 and 16. They were denied by the Patent Office tribunals on the ground that they were unpatentable
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