Patents by Inventor Walter J. Oppermann

Walter J. Oppermann 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 of heating contents in a self venting container
    Patent number: 4419373
    Abstract: A sealed package, and a method of heating a sealed package of material are disclosed wherein the material is capable of generating vapor from a substance contained therein when the temperature of the material is raised. At least a portion of the packaging structure comprises a plastic film. Thermal energy is applied to the material causing the plastic film to be displaced by generated vapor. After the film is displaced, a vent hole appears in the film, venting the vapor without substantial rupture of the film.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: December 6, 1983
    Assignee: American Can Company
    Inventor: Walter J. Oppermann
  • Package including product support insert
    Patent number: 4375482
    Abstract: An improved bacon package is disclosed. The stiffening packaging element, commonly known as a bacon board, has full width top and bottom panels which support the bacon from the bottom and cover it over the entire top. Cover flaps on the ends of the top panel are defined by lines of weak bending resistance, and function to cover the ends of the array of bacon when the packaging element and bacon are enclosed in plastic films in a vacuum packaging operation.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: March 1, 1983
    Assignee: James River-Dixie/Northern, Inc.
    Inventors: Raymond V. Maroszek, Walter J. Oppermann