Patents by Inventor Karl L. Grauf

Karl L. Grauf 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).

  • Sloped display carton
    Patent number: 4756408
    Abstract: A display carton for use with articles which cannot independently support themselves in an upright position. The carton is formed so that the back panel forms an angle greater than 90.degree. with the bottom panel to allow such articles to lean back against the back panel. The front panel may also be at the same angle. The bottom is formed from flaps foldably attached to the front, side and bottom panels which function to automatically form the bottom panel when a carton sleeve is opened into carton shape.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: July 12, 1988
    Assignee: Manville Corporation
    Inventor: Karl L. Grauf