Patents by Inventor David L. DeMent

David L. DeMent 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).

  • Process of making a lined container and the product
    Patent number: 4892223
    Abstract: A lined container is formed by providing a tubular structure having vertically extending sides, a top edge and a bottom edge. Horizontal slits are formed in the side walls with the slits being near the top edge. A flexible bag liner is inserted in the container and the open end is pulled around the outside top surface of the tubular container and the edges are stuffed through the slits which frictionally hold the liner in operative position.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: January 9, 1990
    Assignee: Unipac, Inc.
    Inventor: David L. DeMent