Patents by Inventor John A. Wert

John A. Wert 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 imparting a fine grain structure to aluminum alloys having precipitating constituents
    Patent number: 4295901
    Abstract: A method is provided to impart a fine grain structure to aluminum alloys which have precipitating constituents. The alloy is overaged to form coarse precipitates, and then plastically deformed at least 40%. Deformation is accomplished at a temperature above the alloy's recrystallization temperature and below its solvus temperature at a sufficiently high rate to introduce strain energy into the alloy before complete recovery can occur. The alloy is subsequently held at a recrystallization temperature to form a new fine grain structure.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: October 20, 1981
    Assignee: Rockwell International Corporation
    Inventors: Wayne M. Robertson, John A. Wert