Patents by Inventor Marilu S. de Liendo

Marilu S. de Liendo 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).

  • Fertilizers having a high hardness and storage stability
    Patent number: 5114458
    Abstract: A fertilizer composition characterized by high mechanical resistance and anti-caking properties comprises a compound selected from the group consisting of urea, ammonium sulphate, nitrogen-potassium-phosphorus granulates, mono-ammonic phosphate, di-ammonic phosphate, potassium chloride and mixtures thereof admixed with a hydrosoluble lignate salt selected from the group consisting of sodium lignates, alkaline metal lignates, ammonium lignates, and mixtures thereof in an amount of between 0.1 to 5.0 wt. % in the final fertilizer composition.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: May 19, 1992
    Assignee: Intevep S.A.
    Inventors: Jose R. Castillo, Marilu S. de Liendo