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) |