476. ------. [DE SIMÓ, M.] (Shell Development Co.). Hydrogen and Carbon Monoxide From Natural Gas and Zinc Oxide. United States Patent 1,899,184, Feb. 28, 1933; appl. filed Mar. 24, 1930. Serial No. 438,633. Chem. Abs., vol. 27, 1933. p. 3063.

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476. ------. [DE SIMÓ, M.] (Shell Development Co.). Hydrogen and Carbon Monoxide From Natural Gas and Zinc Oxide. United States Patent 1,899,184, Feb. 28, 1933; appl. filed Mar. 24, 1930. Serial No. 438,633. Chem. Abs., vol. 27, 1933. p. 3063.

See Canadian Patent 319,121 (abs. 475).