Patents by Inventor Jean-Daniel Bornand

Jean-Daniel Bornand 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).

  • Apparatus for lowering the concentration of sodium in aluminum melts
    Patent number: 4174826
    Abstract: The sodium content of aluminum melt is reduced efficiently to within acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part comprises carbon. The treatment is carried out before alloy additions are made, and the temperature of the melt before entering the filter is higher than 780.degree. C.
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: November 20, 1979
    Assignee: Swiss Aluminium Ltd.
    Inventors: Kurt Buxmann, Jean-Daniel Bornand, Alfred Steinegger
  • Process for lowering the concentration of sodium in aluminum melts
    Patent number: 4138246
    Abstract: The sodium content of aluminum melt is reduced efficiently to within acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part comprises carbon. The treatment is carried out before alloy additions are made, and the temperature of the melt before entering the filter is higher than 780.degree. C.
    Type: Grant
    Filed: March 22, 1977
    Date of Patent: February 6, 1979
    Assignee: Swiss Aluminium Ltd.
    Inventors: Kurt Buxmann, Jean-Daniel Bornand, Alfred Steinegger