Patents by Inventor Jean Desbrest

Jean Desbrest 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 eliminating metallic impurities from magnesium by injecting a halogenated derivative or boron
    Patent number: 4417920
    Abstract: The invention concerns a process for eliminating metallic impurities from magnesium, in particular iron, silicon and manganese.For that purpose, a halogenated derivative of boron such as BCl.sub.3 is injected into the molten magnesium, in a proportion of from 0.05 to 5 kg of pure boron per tonne of magnesium. The magnesium may first be subjected to a refining operation using TiCl.sub.4 or a mixture comprising TiCl.sub.4 +FeCl.sub.3.The magnesium produced contains less than 1 ppm of residual boron, less than 20 ppm of Fe and Si and less than 30 ppm of Mn.
    Type: Grant
    Filed: November 2, 1982
    Date of Patent: November 29, 1983
    Assignee: Societe Francaise d'Electrometallurgie Sofrem
    Inventors: Andre Mena, Jean-Michel Charriere, Jean Desbrest