Patents by Inventor Jean Guimont

Jean Guimont 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 and apparatus for treating foundry sludge to recover magnesium
    Patent number: 6409980
    Abstract: Process and apparatus for recovering magnesium from foundry sludge and cell bleed electrolytes includes structure and/or steps for: (i) dissolving, in a water slurry, soluble chloride compounds in the magnesium-containing material; (ii) acidifying the water slurry to between substantially pH 4 and substantially pH 6; (iii) further acidifying the water slurry to between substantially pH 1 and substantially pH 0, and providing a magnesium chloride solution; (iv) precipitating calcium from the magnesium chloride solution; (v) separating solids from the magnesium chloride solution; (vi) stripping SO2 from the magnesium chloride solution; and (vii) precipitating NaCl from the magnesium chloride solution to provide a concentrated magnesium chloride solution.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: June 25, 2002
    Assignee: Noranda, Inc.
    Inventors: Carl W. White, Jean Guimont, Denys Pinard, Serge Monette
  • Recovery of lead and others metals from smelter flue dusts
    Patent number: 5961691
    Abstract: The present invention is concerned with a process for extracting and recovering lead or lead derivatives in high purity from various materials containing lead sulphate, and particularly copper smelter flue dusts. The present process also allows the substantially complete recovery or recycling of precious metals otherwise lost in flue dusts wastes.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: October 5, 1999
    Assignee: Noranda, Inc.
    Inventors: Denys Pinard, Jean Guimont