Court of Appeals for the D.C. Circuit December 22, 1908, No. 506 (Mark v. Greenawalt)

Mr. Chief Justice Shepard

delivered the opinion of the Court:

This is an interference proceeding between opposing applicants Charlie Mark and John E. Greenawalt, for a patent for a process of subjecting materials to the action of air and other gases. The process is practised by the introduction of air or other oxygen containing gas through the porous bed or hearth of a reverberatory furnace.