Patents by Inventor Janet M. Streif

Janet M. Streif 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).

  • Controlled coextrusion of barrier sheet
    Patent number: 4676936
    Abstract: The thickness of the barrier layer in coextruded multilayer, thermoformable resinous sheet material is controlled by transverse color monitoring during coextrusion of the sheet.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: June 30, 1987
    Assignee: The Dow Chemical Company
    Inventors: Theodore C. Wallace, Janet M. Streif