Patents by Inventor Stephen J. Erwin

Stephen J. Erwin 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).

  • Forming and heat treating process
    Patent number: 4048836
    Abstract: This invention relates to a forming and heat treating process and, more particularly, a process for forging and heat treating an aluminum alloy article wherein the article is quickly cooled after solution heat treating to terminate aging and to cause shrinkage and then is subjected to a re-striking operation to produce stress relieving.
    Type: Grant
    Filed: August 26, 1976
    Date of Patent: September 20, 1977
    Assignee: Wyman-Gordon Company
    Inventors: Robert A. Eddy, Norman F. Gustafson, Stephen J. Erwin