Patents by Inventor Stephen Szpara

Stephen Szpara 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 ballistic aluminum armor using cold spraying and friction stirring processes
    Patent number: 8114474
    Abstract: A metallic glass particle layer is applied to aluminum alloy armor and friction stir mixed into the surface in order to embed the material into the armor and to take advantage of its exceptional hardness. An advantage of the invention is that the hard material is an integral part of the armor, included within the body of the armor plate and not merely a surface coating. The advantage of the friction stir process is that it generates relatively low levels of heat and magnetic measurements show that the amorphous phase condition of the metallic glass is not deteriorated. The armor may be tempered to improve properties.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: February 14, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Philip J. Dudt, David R. Forrest, Jennifer N. Wolk, Stephen Szpara