Patents by Inventor Umberto Ducati

Umberto Ducati 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).

  • Patent number: 4460442
    Abstract: In the method the ground scraps are screened to separate the pole active material, i.e. Pb and PbO.sub.2, as fines. This active material is then reacted in the presence of a strong alkaline solution to yield a minium precipitate.Minium may be subsequently treated with an appropriate acid, such as fluoboric acid, freed of antimony by precipitating the latter with metal lead, and then subjected to electrolysis to recover lead.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: July 17, 1984
    Assignee: Hydrometal S.p.A.
    Inventor: Umberto Ducati
  • Patent number: 4420380
    Abstract: An electrolytic method is described for extracting heavy metals, in particular lead, from sulphide concentrates, wherein the concentrates are dissolved in molten chlorides and chlorinated. Then the chlorides of the metals to be extracted are subjected to electrolysis in molten salts, and the vapor phase sulphur separated by the chlorination step is then recovered as elemental sulphur.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: December 13, 1983
    Assignee: Gianfranco Rambaldini
    Inventor: Umberto Ducati