Patents by Inventor Jean-Pierre Derivaz

Jean-Pierre Derivaz 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).

  • Electrolysis method and packed cathode bed for electrowinning metals from fused salts
    Patent number: 4824531
    Abstract: Described is a cell for the electrowinning of metals from fused salt baths, especially aluminum from cryolite-alumina, featuring a packed cathode bed of loose refractory materials resistant to the molten metal and disposed at the base of the cell.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: April 25, 1989
    Assignee: Eltech Systems Corporation
    Inventors: Jean-Jacques R. Duruz, Jean-Pierre Derivaz
  • Molten salt electrowinning method, anode and manufacture thereof
    Patent number: 4614569
    Abstract: A method of electrowinning a metal such as aluminum from e.g. a cryolite based melt containing alumina employs an enode having as its operative surface a protective coating which is maintained by the presence of constituents of the coating dissolved in the melt. The protective coating is preferably a fluorine-containing cerium oxycompound electro-deposited in-situ from cerium species dissolved in a fluoride-based melt.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: September 30, 1986
    Assignee: Eltech Systems Corporation
    Inventors: Jean J. Duruz, Jean-Pierre Derivaz, Pierre-Etienne Debely, Iudita L. Adorian
  • Aluminum production cell components
    Patent number: 4600481
    Abstract: A component for an aluminum production cell comprising a refractory matrix having a rigid porous structure substantially filled with aluminum.
    Type: Grant
    Filed: December 30, 1982
    Date of Patent: July 15, 1986
    Assignee: Eltech Systems Corporation
    Inventors: Ajit Y. Sane, Douglas J. Wheeler, Dan Gagescu, Pierre E. Debely, Iudita L. Adorian, Jean-Pierre Derivaz
  • Ceramic oxide electrodes for molten salt electrolysis
    Patent number: 4552630
    Abstract: A substantially non-consumable anode used in the production of aluminium from a cryolite-based fused bath containing alumina consists of a sintered self-sustaining ceramic oxide body of spinel structure which is made conductive by selective partial substitution, the introduction of non-stoichiometry or by doping so as to maintain the impurities in the produced aluminium at low levels. Preferred materials are partially-substituted nickel ferrite spinels.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: November 12, 1985
    Assignee: ELTECH Systems Corporation
    Inventors: Douglas J. Wheeler, Jean-Jacques R. Duruz, Ajit Y. Sane, Jean-Pierre Derivaz
  • Cermet anode electrowining metals from fused salts
    Patent number: 4397729
    Abstract: An anode for use in electrowinning molten metal from a fused salt bath, e.g., aluminium from cryolite-alumina, consists of a cermet material formed from a ceramic oxide of, e.g., a ferrite or chromite, and a metal, e.g.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: August 9, 1983
    Assignee: Diamond Shamrock Corporation
    Inventors: Jean-Jacques R. Duruz, Jean-Pierre Derivaz