Patents by Inventor Najdat Redha

Najdat Redha 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 manufacture of polyurethane foamed plastics
    Patent number: 5270347
    Abstract: The invention relates to a process for the manufacture of polyurethane foamed plastics which are formed by adding the polyurethane reactants to a solution of salts which decompose upon the exothermic polymerization reaction of said reactants to give off nitrogen gas which in turn foams the resultant polyurethane plastic.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: December 14, 1993
    Inventors: Herbert Prignitz, Najdat Redha