Patents by Inventor Paul Fossi

Paul Fossi 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 the recovery and purification of germanium from zinc ores
    Patent number: 4090871
    Abstract: The invention provides a process for recovering germanium as germanium oxide from a germaniferous metallic zinc which involves distilling the germaniferous metallic zinc under non-oxidizing conditions, recovering the distillation residue which contains the germanium, leaching the recovered distillation residue with chlorine water to convert the germanium into germanium tetrachloride, hydrolyzing the germanium tetrachloride into germanium oxide, and recovering the germanium oxide. Optionally, the germanium oxide may be reduced to metallic germanium, if desired.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: May 23, 1978
    Assignee: Societe Miniere et Metallurgique de Penarroya
    Inventors: Albert Lebleu, Paul Fossi, Jean-Michel Demarthe