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ES21292A1897-08-051897-08-05El procedimiento para el tratamiento de minerales sulfitos complejos por medio de los aparatos que se describen.
ExpiredES21292A2
(es)
Un procedimiento químico perfeccionado para separar los componentes metálicos de los pedregosos en los minerales, por medio de los aparatos que se describen.
Un sistema perfeccionado para la concentración o separación sucesiva de minerales triturados, residuos o fangos de los mismos, por medio del aparato que se describe.