Patents by Inventor Alan D. Preis

Alan D. Preis 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).

  • Composite plastic track and method of making
    Patent number: 4565725
    Abstract: A plastic track of composite construction is for use as an integral part of display stands of the gravity feed type which are commonly used in retail outlets and is formed by a coextrusion method wherein a quantity of high impact polystryene is heated to an extrudable temperature while a mixture of high impact polystryene and organopolysiloxane is similarly heated and extruded and the two molten melts are joined homogeneously under temperature and pressure within the die head to form a mechanically strong strack having a low friction sliding surface.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: January 21, 1986
    Assignee: The Mead Corporation
    Inventors: William S. Spamer, Alan D. Preis