Patents Assigned to Tetra Plastics
  • Laminated resilient flexible barrier membranes
    Patent number: 6620472
    Abstract: The present invention relates to laminated membranes formed by multi-layer processing techniques including alternating layers of thermoplastic urethane and a copolymer of ethylene and vinyl alcohol. The membranes are characterized in that hydrogen bonds are formed between the layers of thermoplastic urethane and the copolymer of ethylene and vinyl alcohol. The membranes are characterized in that hydrogen bonds are formed between the layers of thermoplastic urethane and the copolymer of ethylene and vinyl alcohol.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 16, 2003
    Assignees: Nike, Inc., Tetra Plastics
    Inventors: Erwin C. Shepard, DeWayne R. Hartlerood, Paul H. Mitchell