Patents by Inventor John W. Turnbull

John W. Turnbull 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).

  • Eliminating adhesion difference due to glass orientation in laminated safety glass
    Patent number: 6599630
    Abstract: A laminar structure comprised of at least two layers FORCE (16, 20) of glass and a sheet (18) of plasticized PVB containing an adhesion control additive is provided wherein the difference in adhesion between the PVB interlayer and the glass due to glass orientation is minimized by including a leveling agent in the bulk or on the surface of the sheet of plasticized PVB or by coating the leveling agent onto the glass prior to laminating.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: July 29, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard Anthony Walter Fugiel, John W. Turnbull, Bert C. Wong
  • Laminar product and process for preparing the same
    Patent number: 6521347
    Abstract: A laminar structure comprised of at least one layer of glass and a sheet of plasticized PVB containing an adhesion control agent is provided wherein pin point pockets of air which are entrapped in said sheet coalesce and cause delamination of said structure, delayed delamination and associated defects are prevented by adding a nucleating agent with the plasticized PVB by coating the sheet or glass surface with a nucleating agent, by extruding the PVB sheet with the nucleating agent in the composition, or by forming the nucleating agent in situ during the extrusion or lamination process.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: February 18, 2003
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jerrel Charles Anderson, Ioannis V. Bletsos, John W. Turnbull, Bert C. Wong
  • Delamination-resistant laminated glass structures
    Patent number: 6372352
    Abstract: A laminar structure comprised of at least one layer of glass and a sheet of plasticized PVB containing an adhesion control agent is provided wherein delamination resulting from air being from air being dispersed or entrapped and dissolved in the PVB is controlled by use of a surface energy modifying agent, said surface energy modifying agent being selected to provide a total surface energy for the sheet of less than 52 dynes/cm.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: April 16, 2002
    Assignee: E. I. du Pont de Nemours and Co.
    Inventors: Ioannis V. Bletsos, John W. Turnbull, Bert C. Wong