Patents by Inventor John A. Berggren

John A. Berggren 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).

  • Forming molecularly oriented containers from preforms
    Patent number: 3957934
    Abstract: In a method of conditioning preforms to be molded into containers which includes feeding them in groups to a temperature-conditioning zone where they are reduced to orientation temperature for immediate molding into containers, improvements are provided which involve diverting other groups away from the temperature-conditioning zone to an adjacent cooling zone wherein they are reduced to a temperature whereat sticking together cannot occur, prior to collecting them for later molding.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: May 18, 1976
    Assignee: Monsanto Company
    Inventors: L. John Berggren, Joseph R. Reilly