Patents by Inventor K. Marc Le Vier

K. Marc Le Vier 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 treating ore having recoverable metal values including arsenic containing components
    Patent number: 6482373
    Abstract: Roasting of ores with metal values such as precious metal ores for recovery of metal values with conversion of arsenic to an insoluble form in-situ in presence of an additive such as iron and in presence of oxygen injected initially or supplementally in a roaster such as in a circulating fluid bed roaster; volatilized arsenic in roasting of ores may also be converted to an insoluble form in gas phase in a two stage roaster process after removal of solids from a gas phase and contact with an additive at high oxygen concentration in a second stage roaster.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: November 19, 2002
    Assignee: Newmont USA Limited
    Inventors: Anthony L. Hannaford, K. Marc Le Vier, Rene R. Fernandez, Gopalan Ramadorai, Arno Fitting, Gurudas Samant, Bodo Peinemann, Gebhard Bandel, Hans Kofalck
  • Process for treating ore having recoverable metal values including arsenic containing components
    Patent number: 6248301
    Abstract: Refractory gold ores are roasted in the presence of added fuels in an oxidizing atmosphere in a fluidized bed at a temperature from 450 to 650° C., which is supplied with oxygen-containing gases; to achieve a low ignition and thus low roasting temperature, sulfur, pyrite or mixtures thereof are used as added fuels.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: June 19, 2001
    Assignee: Newmont Mining Corporation and Newmont Gold Company
    Inventors: Anthony L. Hannaford, K. Marc Le Vier, Rene R. Fernandez, Gopalan Ramadorai, Arno Fitting, Gurudas Samant, Bodo Peinemann, Gebhard Bandel, Hans Kofalck