Patents by Inventor Arturo D'Este

Arturo D'Este has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for purifying solutions of zinc sulphate
    Patent number: 4637832
    Abstract: A process for purifying aqueous solutions of zinc sulphate removed from leaching processes and containing metals such as Cu, Cd, Ti, Ni, Co, Ge, As, Sb which consists in cementing said metals with zinc dust and with a couple of activators chosen between Cu-As and Cu-Sb in one or more reaction vessels having a bottom portion of cylindrical shape, an intermediate portion of cone frustum shape, and a top portion having an enlarged section thereof.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: January 20, 1987
    Assignee: SAMIM Societa Azionaria Minero-Mettallurgica, S.p.A.
    Inventors: Sergio Cammi, Arturo D'Este, Alessandro Pescetelli