Patents by Inventor Per Olof Christer Engman

Per Olof Christer Engman 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).

  • Package made from paper, cardboard, cellular cardboard and like materials
    Patent number: 3955746
    Abstract: A package or container made of paper or like material having a number of planar panels which are reinforced solely in narrow zones extending along the panel edges by a thermoset resin impregnating the material. A package forming method of locally impregnating a package blank in load carrying areas with a thermosetting resin.
    Type: Grant
    Filed: December 5, 1973
    Date of Patent: May 11, 1976
    Assignee: Svenska Traforskningsinstitutet
    Inventor: Per Olof Christer Engman