Patents by Inventor Anne L. Ehrenberger

Anne L. Ehrenberger 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).

  • Dual scored easy open film
    Patent number: 7531228
    Abstract: A film having a line of weakness and a method for making a film having a line of weakness are provided. The film has a barrier layer of extruded ethylene vinyl alcohol laminated on one side to a first layer of oriented polypropylene having a score line therein. The barrier layer is laminated on its second side to a second layer of polyethylene teraphthalate having a score line therein. The score line in the oriented polypropylene layer and the score line in the polyethylene teraphthalate layer lie in a plane substantially perpendicular to a plane of the film forming the line of weakness.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: May 12, 2009
    Assignee: Alcan Packaging Flexible France
    Inventors: Chad M. Perre, Anne L. Ehrenberger