Return to Abstracts of Patents Return to Abstracts of Patents 750-999 Patent Abstracts802. GIESEN, J., HANISCH, H., AND DALLY, M. (I. G. Farben Industrie A. G.). Purifying Alcohols. German Patent 671,261, Feb. 6, 1939 (Cl. 12 o-5.02). Chem. Abs., vol. 33, 1939. p. 3391. See United States Patent 2,099,475 (abs. 804). |