Patents by Inventor Sasha Hamdy Radwan

Sasha Hamdy Radwan 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).

  • Mould for metal casting
    Patent number: 6863113
    Abstract: A process for forming a mould or a core for casting molten metal by machining (e.g. cutting or drilling) to the desired shape a bonded particulate refractory material wherein the shear strength of the refractory particles is less than the shear strength of the bonds between the particles. The preferred particulate is aluminosilicate microspherers (e.g. “flyash floaters”) and the binder is preferably based on silica (e.g. fumed silica/sodium hydroxide). The bonded particulate material is easily machined to form accurately dimensioned moulds or parts thereof.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: March 8, 2005
    Assignee: Foseco International Limited
    Inventors: Emad El-Demallawy, Sasha Hamdy Radwan
  • Mould for metal casting
    Publication number: 20030183364
    Abstract: A process for forming a mould or a core for casting molten metal by machining (eg cutting or drilling) to the desired shape a bonded particulate refractory material wherein the shear strength of the refractory particles is less than the shear strength of the bonds between the particles. The preferred particulate is aluminosilicate microspherers (eg “flyash floaters”) and the binder is preferably based on silica (eg fumed silica/sodium hydroxide). The bonded particulate material is easily machined to form accurately dimensioned moulds or parts thereof.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 2, 2003
    Inventors: Emad El-Demallawy, Sasha Hamdy Radwan