2807. ----- [ROELEN, O.] (Ruhrchemie A. G.). [Tubular Heat-Exchange Apparatus for Effecting Catalytic Gas Reactions.] German Patent 675,182, May 2, 1939 (Cl. 12 g-4.02). Chem. Abs., vol. 33, 1939, p. 5240.

PATENTS

2807. ----- [ROELEN, O.] (Ruhrchemie A. G.). [Tubular Heat-Exchange Apparatus for Effecting Catalytic Gas Reactions.] German Patent 675,182, May 2, 1939 (Cl. 12 g-4.02). Chem. Abs., vol. 33, 1939, p. 5240.

See abs. 647, 648, 692, 693, 950, 951, 952, 1989, 1990,1991, 2138, 2139, 2144, 2145, 3240