Patents by Inventor Robert J. Dunstan

Robert J. Dunstan 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).

  • Carton pourer attachment
    Patent number: 4846369
    Abstract: A carton pourer attachment for a carton of "gable top" type, which has two conduits, one a breather conduit and a second a pourer conduit that are attached to the top of a common support which has two dependent legs adapted to grip the carton sides during a piercing action; and the pourer conduit has a tongue adapted to push away from a sealing position any tab cut from the top of a carton and also provide an interlocking with a middle lip of the carton to resist removal of the attachment.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: July 11, 1989
    Inventor: Robert J. Dunstan
  • Clip on sunshade for eyeglasses
    Patent number: D322976
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: January 7, 1992
    Inventor: Robert J. Dunstan