Patents by Inventor Mario Noriega

Mario Noriega 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).

  • Red mud dewatering and washing process
    Patent number: 6033579
    Abstract: The invention covers a process for dehydration/filtration, and washing of red mud, if applicable with addition of sand, particularly from the Bayer process for aluminum production from bauxite, in which filters are used and caustic is washed out on the filter. The invention is basically characterized by washing and dehydration being effected under pressure above atmospheric with regeneration of bound caustic and production of a residue with a high solids concentration. In addition, the invention covers a plant for the implementation of the process.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: March 7, 2000
    Assignee: Andritz-Patentverwaltungs-Gesellschaft m.b.H
    Inventors: Hubert Riemer, Nils Oeberg, Heinz Perchthaler, Paolo Murgia, Mario Noriega