Patents by Inventor Walter E. Littman

Walter E. Littman 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).

  • Heat-resisting package for hot-melt adhesive
    Patent number: 6294761
    Abstract: A method for heat-sealing a sheet of heat-resisting polymer to a heat-resisting polymeric fitment, which enables the fabrication of a containment and delivery system for a bulk quantity of meltable adhesive, wherein a rigid container is lined by a heat-resisting flexible envelope, with a heater interposed between them. Ports are sealed to the envelope to permit the filling and draining of molten adhesive.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: September 25, 2001
    Inventors: Raymond David Diederich, Walter E. Littman