Patents by Inventor Ivan Barker

Ivan Barker 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).

  • Polymeric filaments and process for forming such material
    Patent number: 4359441
    Abstract: Process and apparatus for modifying melt spun filaments after extrusion and solidification by tensioning and exposing to a heated fluid environment. By this invention it is possible to directly form a melt spinnable filamentary yarn having properties similar to those of drawn yarns.
    Type: Grant
    Filed: August 24, 1979
    Date of Patent: November 16, 1982
    Assignee: Imperial Chemical Industries, Limited
    Inventors: Ivan Barker, Geoffrey Marshall