PATENT

3420. ----- SOCIÉTÉ L’AIR LIQUIDE.[Apparatus for Effecting Exothermic Catalytic Gas Reactions.]  German Patent 585,278, Nov. 14, 1933 (Cl. 12g-4.02).  Chem. Abs., vol. 28, 1934, p. 1226.

See British Patents 268,722 and 275,592 (abs. 3429 and 3426)