The process step covered by the alleged patent comprised the employment of the solid arc-cast first ingot, without intermediate fabrication, as an electrode and consumably arc remelting the first ingot alone in a cooled mold, the mold forming the outer electrode. In support of its determination that the alleged invention was obvious on April 4, 1952, when inventors Hurford and Gordon first disclosed the process to their subordinates, the district court made extensive findings of fact (eighty-two paragraphs), followed by conclusions of law, all of which are set out in 306 F. Supp. 402 (D.C.Nev. 1969). We will assume that the reader of this opinion is familiar with those findings and conclusions.