Return to Abstracts of Patents Return to Abstracts of Patents 750-999 Patent Abstracts757. ------. [FROELECKE, E., LÜBEN, R., MEYER, K., AND SCHALLER, P.] (Ruhrchemie A. G.). [Separation of Thorium From Material Containing Iron and Thorium.] French Patent 847,409. Oct. 10, 1939: appl. R 101,219. R-374, filed Jan. 8, 1938 (Cl. VI-40 a). Meyer Transl. PC-S-II, Fischer-Tropsch, vol. 4. chap. 131, 1949. p. 14: Chem. Abs., vol. 35, 1941, p. 5084. See French Patent 847,409 (abs. 756). FUJIMURA, K. See abs. 1868. |