Patents Assigned to Graboplast
  • Coated composite material for lining passages
    Patent number: 4521465
    Abstract: A bonded composite laminate is provided comprising a textile layer and a plastic film which contains polyurethane urea coating which laminate is suitable for lining and repair of pipelines and canalizations.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: June 4, 1985
    Assignees: Bayer Aktiengesellschaft, Graboplast
    Inventors: Walter Schroer, Gyula Wlasitsch