Patents by Inventor Douglas John Sekelik

Douglas John Sekelik 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).

  • Oxygen scavenging PET based polymer
    Patent number: 6544611
    Abstract: The present invention improves the effectiveness of the oxygen scavenging composition and maintains an excellent balance in the color properties of the polymer. The present invention relates to an improved oxygen scavenging PET based copolymer comprising from about 10 to about 120 ppm cobalt based on the PET polymer, and from about 15 to about 150 ppm zinc based on the PET polymer. The present invention also comprises a process for preparing a PET based oxygen scavenging copolymer, comprising the steps of: a) polymerizing a PET based polymer; b) adding Zn, Co, and an oxygen scavenging compound during said polymerizing step; c) copolymerizing said oxygen scavenging compound with said PET based polymer to form a copolymer; and d) extruding said copolymer.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: April 8, 2003
    Assignee: Arteva North America S.A.R.L.
    Inventors: David Anthony Schiraldi, Douglas John Sekelik, Brad Lee Smith
  • Oxygen scavenging PET based polymer
    Publication number: 20030031815
    Abstract: The present invention improves the effectiveness of the oxygen scavenging composition and maintains an excellent balance in the color properties of the polymer. The present invention relates to an improved oxygen scavenging PET based copolymer comprising from about 10 to about 120 ppm cobalt based on the PET polymer, and from about 15 to about 150 ppm zinc based on the PET polymer.
    Type: Application
    Filed: August 1, 2001
    Publication date: February 13, 2003
    Inventors: David Anthony Schiraldi, Douglas John Sekelik, Brad Lee Smith