Patents by Inventor Caroline Tjhen Shibata

Caroline Tjhen Shibata 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).

  • Moisture stable tuftstring carpet
    Patent number: 5906877
    Abstract: This invention provides moisture stable tuftstring carpet assemblies. The pile surface structure comprises a moisture stable backing substrate, a plurality of elongated pile articles each comprising an elongated, moisture stable support strand having bonded thereto a plurality of "U" shaped bundles of multifilament yarn. The pile articles are bonded to the backing substrate. Different backing substrates and support strands may be used.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: May 25, 1999
    Assignee: E. I. du Pont de Nemours & Co.
    Inventors: Peter Popper, Rashi Akki, Lap-Tak Andrew Cheng, Carmen Anoish Covelli, Sassan Hojabr, George Kevork Kodokian, Vijayendra Kumar, James K. Odle, Kalika Ranjan Samant, Caroline Tjhen Shibata, Wae-Hai Tung, Gregory Paul Weeks, Paul Wesley Yngve
  • Method for producing solution dyed articles from thermoplastic polymers
    Patent number: 5756020
    Abstract: A process for producing solution dyed extruded articles from thermoplastic polymer wherein each colorant is contained in a separate color concentrate and each concentrate is fed to an extruder through a separate gravimetric feeder where the concentrates are melt blended with the thermoplastic polymer prior to extruding.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: May 26, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John S. Locke, Paul Sheldon Pearlman, Caroline Tjhen Shibata, Kenneth J. Tadler