Patents by Inventor Werner H. Kuenzi

Werner H. Kuenzi 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).

  • Peelable laminated structures and process for production thereof
    Patent number: 5582884
    Abstract: The invention provides a peelable laminated structure suitable for use in a peelable seal joining a flexible closure element (23) to a container (20) or in foil/polymer laminates used for packaging and the like. The structure comprises a porous-anodizable metal substrate (11) and a porous anodic film (12) overlying and attached to a surface of the substrate. The porous anodic film (12) has a weakened stratum (19) positioned between an outer film part and an underlying structure including the metal substrate (11). The weakened stratum (19) is strong enough in use of said structure to prevent detachment of the outer film part from the underlying structure, except by deliberate peeling of the flexible closure element (23). The invention also relates to a process for producing the structure and to peelable containers and recyclable laminates incorporating the structure.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: December 10, 1996
    Assignee: Alcan International Limited
    Inventors: Melville D. Ball, Laurie A. Coady, Werner H. Kuenzi, Robert G. Jones