Patents by Inventor Peter P. Hoj

Peter P. Hoj 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).

  • Method for the molecular orientation of plastic material
    Patent number: 4863670
    Abstract: A method for the molecular orientation of plastic material by expanding a tube of plastic material, includes introducing the tube into a container filled with heated liquid, preferably water of a temperature of 70.degree.-100.degree. C. The tube is expanded by introducing a pressurized liquid into the tube. An apparatus for carrying out the method and a plastic material are also disclosed.
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: September 5, 1989
    Assignee: Tetra Pak Developpement SA
    Inventor: Peter P. Hoj