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| Number | Title | Issue Date |
| 3960715 | Cationic froth flotation process An improved cationic froth flotation process for the separation of silicious gangue particles from oxidic iron mineral particles wherein the silicious particles are induced to float, and the iron mineral particles remain in suspension near the bottom of t... | 06/01/1976 |
| 3951786 | Oxidizing method in froth flotation of minerals An improved method in concentration of oxide ores and minerals by froth flotation process which comprises subjecting a pulp of mineral slurry to the combined action of a organic nitrogen compound with one or more NH2 group and hypochlorite in a... | 04/20/1976 |
| 3941688 | Method for separation of mixture of polyester and cellulose derivative A method for the separation of a mixture of a polyester and a cellulose derivative comprising introducing gas bubbles into an aqueous liquid medium containing the mixture of the polyester and the cellulose derivative, optionally in the presence of at leas... | 03/02/1976 |
| 3936294 | Reagent for zinc ore and method of utilizing same A method of activating zinc sphalerite mineral is provided. Zinc sphalerite is crushed and ground in a known manner then cleaned and sent to an activating station. An ammoniated aqueous solution of CuCO3 or CuCl2 is used to activate ... | 02/03/1976 |
| 3933633 | Method for separating vinyl chloride A method for separating vinyl chloride from a mixture of vinyl chloride with other non-plastic substances such as sand and soil, metals, glass or rubbers which comprises introducing gas bubbles into a dispersion of the vinyl chloride mixture in an aqueous... | 01/20/1976 |
| 3930997 | Univalent metal double cyanide as reducing agents in froth flotation of mineral An improved method in concentration of oxide ores and minerals by froth flotation process which comprises subjecting a pulp of mineral slurry of an oxide ore or mineral of metal which can change the valency state from higher to lower by the action of redu... | 01/06/1976 |
