Patents by Inventor Carol Jane Ptacek

Carol Jane Ptacek 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).

  • Treatment of contaminated water
    Patent number: 5876606
    Abstract: The metal oxide media includes oxides and hydroxides of iron, and other metals. The material is derived from basic-oxygen steel-making process, and includes a high calcium content. The oxide surfaces facilitate the adsorption of phosphorus, and the increased pH facilitates the precipitation of calcium and other phosphates. The oxides are a catalyst for converting organic phosphorus to inorganic form. Limestone may be added to the oxides, to ensure a long-term source of calcium, and to maintain high pH for long periods.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: March 2, 1999
    Assignee: University of Waterloo
    Inventors: David William Blowes, Carol Jane Ptacek, Michael John Baker