Patents by Inventor Richard E. Graumann

Richard E. Graumann 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).

  • Laminated packaging film having low vapor and gas permeability
    Patent number: 3932693
    Abstract: A laminated film suitable as a food packaging film comprised of a base layer of an oriented polypropylene film, a layer of a vinylidene chloride polymer adhered to one surface of the base layer, a layer of first ethylene/vinyl acetate copolymer having a vinyl acetate content greater than 10 percent by weight adhered to the vinylidene chloride polymer layer and a top layer of a second ethylene/vinyl acetate copolymer having a vinyl acetate content less than 10 percent adhered to the first ethylene/vinyl acetate copolymer layer.BACKGROUND OF THE INVENTION1. Field of the InventionThis application is a continuation-in-part of copending application Ser. No. 81,941 filed Oct. 19, 1970, and now abandoned.This invention relates to an improved packaging film and more particularly relates to a laminated packaging film having low permeability to gases and a method for the preparation thereof.2.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: January 13, 1976
    Assignee: Continental Can Company, Inc.
    Inventors: Fred B. Shaw, Richard E. Graumann