Patents by Inventor Nilce Ortiz

Nilce Ortiz 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 whitening kaolin
    Patent number: 5242874
    Abstract: The present invention refers to a process for whitening kaolinitic clays by adding an aqueous acid solution containing sodium bisulfite and atomized aluminum powder, thereby causing the reduction of the contaminating iron ions present in the kaolin, resulting in a considerable increase in its whiteness index as well as a reduction of the particle size of the product obtained.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: September 7, 1993
    Assignee: Alcoa Aluminio S.A.
    Inventors: Fabio M. De Oliveira, Nilce Ortiz