Patents by Inventor Leon Dubuisson

Leon Dubuisson 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).

  • Device for the coextrusion of thermoplastics
    Patent number: 4657497
    Abstract: A device for avoiding flow disturbances and stagnation during the production of hollow or solid multilayer elongate structures.
    Type: Grant
    Filed: November 22, 1985
    Date of Patent: April 14, 1987
    Assignee: SOLVAY & Cie (Societe Anonyme)
    Inventors: Claude Dehennau, Marc Kerger, Leon Dubuisson