Patents by Inventor Abbas Najah-Zadeh

Abbas Najah-Zadeh 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).

  • Interstitial free steels and method thereof
    Patent number: 5200005
    Abstract: The strength of interstitial free steels is increased by up to 100% and the ductile to brittle transition temperature is decreased by up to 100.degree. C. by warm finish rolling in the single phase ferrite region below A.sub.rl to effect ferrite dynamic recrystallization of the steel microstructure to a ferrite structure of grain size having a grain size of up to 5 .mu.m, and especially an ultra fine grain size of 1 to 2 .mu.m; the method may be employed in various hot working methods including strip and rod mills, planetary hot rolling and extrusion.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: April 6, 1993
    Assignee: McGill University
    Inventors: Abbas Najah-Zadeh, John J. Jonas, Stephen Yue