Patents by Inventor Hossam A. A. Abdel-Hehim

Hossam A. A. Abdel-Hehim 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 the partial solubilization of phosphate rock and obtaining phosphate fertilizers therefrom
    Patent number: 4523941
    Abstract: A rapid, low temperature process for solubilizing phosphate rocks having high content of foreign matter or a low phosphorus content to obtain: (a) a slow release fertilizer of the NP type; (b) phosphoric acid of high concentration plus MAP; and (c) DAP.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: June 18, 1985
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Hossam A. A. Abdel-Hehim, Wagner C. Coelho, Gloria M. G. Soares
  • Process for the partial solubilization of phosphate rock and obtaining acid and phosphate fertilizers therefrom
    Patent number: 4469504
    Abstract: A rapid, low temperature process for solubilizing phosphate rocks having high content of foreign matter or a low phosphorus content to obtain: (a) a slow release fertilizer of the NP type; (b) phosphoric acid of high concentration plus MAP; and (c) DAP.
    Type: Grant
    Filed: August 24, 1982
    Date of Patent: September 4, 1984
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Hossam Abdel-Hehim, Wagner C. Coelho, Gloria M. G. Soares