Patents by Inventor Robert Anthony Breznak

Robert Anthony Breznak 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).

  • Electrically conductive heterofil
    Patent number: 6242094
    Abstract: An antistatic bicomponent fiber comprises a nonconductive first component made of a first polymer and a conductive second component made of a second polymer containing a conductive material, where the second polymer has a lower melting point than the first polymer. The bicomponent fiber is made by co-extruding the two polymers at a temperature above their melting points, stretching the extruded fiber to increase the tensile strength, and heat treating the fiber at a temperature between the melting point of the first polymer and the melting point of the second polymer to improve the conductivity of the conductive second component. The bicomponent fiber is preferably a sheath/core fiber.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: June 5, 2001
    Assignee: Arteva North America S.A.R.L.
    Inventors: Robert Anthony Breznak, Joseph Andrew Foldhazy, Robert Allen Ritchie, Herman Leslie LaNieve, III, Wolfgang Alfred Piesczek
  • Electrically conductive heterofil
    Patent number: 5916506
    Abstract: An antistatic bicomponent fiber includes a nonconductive first component made of a first polymer and a conductive second component made of a second polymer containing a conductive material, where the second polymer has a lower melting point than the first polymer. The bicomponent fiber is made by co-extruding the two polymers at a temperature above their melting points, stretching the extruded fiber to increase the tensile strength, and heat treating the fiber at a temperature between the melting point of the first polymer and the melting point of the second polymer to improve the conductivity of the conductive second component. The bicomponent fiber is preferably a sheath/core fiber.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: June 29, 1999
    Assignee: Hoechst Celanese Corp
    Inventors: Robert Anthony Breznak, Joseph Andrew Foldhazy, Robert Allen Ritchie, Herman Leslie LaNieve, III, Wolfgang Alfred Piesczek