Patents by Inventor Sanna E. Khalafalla

Sanna E. Khalafalla 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).

  • Selective recovery of nickel, cobalt, manganese from sea nodules with sulfurous acid
    Patent number: 4138465
    Abstract: Nickel, cobalt and manganese are recovered from deep sea nodules by leaching with sulfurous acid. In addition, selective extraction of nickel and cobalt from copper is achieved by suitable adjustment of process variables such as leaching time and volume and concentration of acid.
    Type: Grant
    Filed: December 13, 1977
    Date of Patent: February 6, 1979
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: John E. Pahlman, Sanna E. Khalafalla