Patent US Beneficiation of sylvinite ore .
1974/04/09· I United States Patent 11 1 1111 3,802,632 Dancy Apr. 9, 1974 [54] BENEFICIATION OF SYLVINITE ORE 3,167,502 1/1965 Duke 209/12 1 3,417,927 121909 C k 24] 24 [75] Inventor: William B. Dancy, Carlsbad, N. 3 ...