Patents by Inventor Stan J. Markiewicz

Stan J. Markiewicz 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).

  • Gas barrier structures
    Patent number: 4927689
    Abstract: A gas barrier structure is disclosed which comprises a base synthetic thermoplastic polymeric layer, e.g. nylon, polyethylene, having two coatings on one side of the base layer. The first coating is a solvent-based urethane primer and the second coating comprises a polyvinyl alcohol gas barrier material. The primer is present in the range of 0.3 to 3.0 g/m.sup.2 and the polyvinyl alcohol is present in an amount of up to 2.0 g/m.sup.2. The polyvinyl alcohol is deposited from solution or dispersion.
    Type: Grant
    Filed: July 7, 1987
    Date of Patent: May 22, 1990
    Assignee: Du pont Canada Inc.
    Inventor: Stan J. Markiewicz