Patents by Inventor Derek J. Winter

Derek J. Winter 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).

  • Method for producing enhanced solid state
    Patent number: 7250484
    Abstract: A method for enhancing solid state polymerization of polyethylene terephthalate is disclosed in which at least one monomeric unit of diacid and/or dimethyl ester comprising at least one pendant chemical side group is copolymerized with a diol and a diacid or a dimethyl ester. The at least one pendant chemical side group may include groups chosen from tertiary butyl, hexyl, pentyl, butyl, propyl, ethyl, methyl, nitrosyl (NO2) and sulfonyl (SO2) groups.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: July 31, 2007
    Assignee: Invista North America S.AR.L.
    Inventors: Michael William Gardner, Jill Barbara Cunningham, Derek J. Winter, Stephen D. Jenkins