Patents by Inventor Anna D. Grzymek

Anna D. Grzymek 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 producing high-purity alumina and hydraulic cement
    Patent number: 4226632
    Abstract: A low grade aluminum and silicon containing starting material is intimately mixed with limestone and the resultant mixture is fluidized. The fluidized mixture is preheated to a temperature of 700.degree. to 900.degree. C., then held at sintering temperature for 5 to 10 minutes. Aluminum may be recovered by extraction of the sintered powder so produced.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: October 7, 1980
    Assignee: Tatabanyai Szenbanyak
    Inventors: Laszlo Kapolyi, Geza Szentgyorgyi, Gyorgy Vamos, Jerzy Grzymek, Anna D. Grzymek, Stanislaw Bethke, Bronislaw Werynski