PATENT

3421. ----- SOCIÉTÉ L’AIR LIQUIDE.[Apparatus for Effecting Exothermic Catalytic Gas Reactions.]  German Patent 593,369, Mar. 2, 1934 (Cl. 12g-4.02).  Chem Abs., vol. 28, 1934, p. 2953.

See British Patent 2307,039 (abs. 3417).