Patents by Inventor María Luisa Castro de Esparza

María Luisa Castro de Esparza 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).

  • Composition for arsenic removal from ground water
    Patent number: 6461535
    Abstract: The present invention provides a process for removing arsenic from ground water to be processed and used in remote dwellings. The process includes (a) contacting a clay, a coagulant, and an oxidizer with water containing arsenic to form a coagulated colloidal mixture; (b) adsorbing the arsenic onto the coagulated colloidal mixture; and (c) separating the water from the coagulated colloidal mixture. The invention also provides a composition ready for use in removing arsenic from ground water to be used in remote areas. The composition includes an activated clay, a coagulant, and an oxidizer in predetermined proportions for efficient removal of arsenic from ground water.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: October 8, 2002
    Assignee: Pan American Health Organization
    Inventor: María Luisa Castro de Esparza