Patents by Inventor Patrick Alex

Patrick Alex 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).

  • Polyurethane films and their use for bonding
    Patent number: 5254641
    Abstract: Films of thermoplastic polyurethanes (TPU) with a Shore hardness of 75 A to 92 A having 5 to 20% by weight of polyether amide block copolymers and/or polyether ester block copolymers, and their use for adhering to other substrates, particularly for back-foaming with polyurethane foam. The invention also relates to the use of an addition of 5 to 20% by weight of polyether amide block copolymers and/or polyether ester block copolymers to thermoplastic polyurethanes with Shore hardnesses of 75 A to 92 A, based on the weight of the thermoplastic polyurethanes, for decreasing the adhesion and/or interlocking of thermoplastic polyurethanes produced by single layer blown extrusion technique.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: October 19, 1993
    Assignee: Elf Atochem Deutschland, GmbH
    Inventors: Patrick Alex, Andre Piard, Eduard de Jong