277975-A is referenced by 3 patents.
277,975. Germain, F., (Assignee of Dolter, H.). Sept. 22, 1926, [Convention date]. Retorts.-The Specification as open to inspection under Sect. 91 (3) (a) describes an apparatus for use in destructive distillation which consists of a rotary drum 1 lined with ceramic plates 2 and containing balls 3 which may be of metal, silica, or ceramic material and is charged through an opening normally closed by a lid 14. Gas, heated by passing through tubes 6 in a heating-chamber 7, is supplied by a pipe 5 through a tubular journal 4, and the gaseous products pass out through the other journal 4 to a cooling-pipe 9, the liquid product collecting in a receiver 10 while the gas passes through a pipe 12 and pump 13 to the heating tubes 6 for use again. When the process is finished, the lid 14 is replaced by a grating which allows residue to escape while retaining the balls.; This subject-matter does not appear in the Specification as accepted.