Patents by Inventor Stephen Matras

Stephen Matras 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).

  • Method of extruding aluminum-base oxide dispersion strengthened
    Patent number: 4818481
    Abstract: Disclosed is a method for extruding fine grain aluminum mechanically alloyed powder material such that the resulting extruded product is substantially free of texture, which method comprises extruding a billet of the powder material having a mean grain size less than about 5 microns through a die having an internal contour which conforms substantially to the formula: ##EQU1## where R is the radius of the die contour at any given point x along the major axis of the die orifice from its entry plane, R.sub.o is the radius of the billet, and K is an arbitrary constant.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: April 4, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: Michael J. Luton, Raghavan Ayer, Ruzica Petkovic-Luton, Joseph Vallone, Stephen Matras