565. DU CHAFFAUT, R. (E. I. du Pont de Nemours & Co.). Apparatus for Effecting Catalytic Exothermic Gas reactions Such as Synthesis of Ammonia or Methanol. United States Patent 1,942,021, Jan. 2. 1934. Chem. Abs., vol. 28, 1934. p. 1581.

Patent Abstracts

Catalyst container provided at 1 end with a gas outlet and having a helically grooved exterior is closely and removable fitted within a shell so as to form a helical gas passage communicating at the end of the catalyst container first named with a gas inlet and at the other end with the interior of the catalyst container.

See abs. 627.