3694. ----- [STUDIEN-UND VERWERTUNGS-G. M. B. H.] [Purifying Synthesis Gas] Austrian Patent 151,658, no date. Chem. Zentralb., 1938, I, p. 28.

See French Patent 784,337 (abs. 3693), German Patent 651,462 (abs. 2812), and United State Patent 2,110,240 (abs. 2811).