Patents by Inventor John Clement Chadwick

John Clement Chadwick 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).

  • Titanocene-based catalyst system
    Patent number: 8044155
    Abstract: A catalyst system obtainable by the process comprising the steps of contacting an adduct of formula (I) MgT2.yAlQj(OR?)3-j??(I) wherein T is chlorine, bromine, or iodine; R? is a linear or branched C1-C10 alkyl radical; y ranges from 1.00 to 0.05; and j ranges from 0.01 to 3.00; with at least one metallocene compound having titanium as central metal and at least one ligand having a cyclopentadienyl skeleton.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: October 25, 2011
    Assignee: Stichting Dutch Polymer Institute
    Inventors: John Richard Severn, John Clement Chadwick
  • TITANOCENE-BASED CATALYST SYSTEM
    Publication number: 20080234452
    Abstract: A catalyst system obtainable by the process comprising the steps of contacting an adduct of formula (I) MgT2.yAlQj(OR?)3-j ??(I) wherein T is chlorine, bromine, or iodine; R? is a linear or branched C1-C10 alkyl radical; y ranges from 1.00 to 0.05; and j ranges from 0.01 to 3.00; with at least one metallocene compound having titanium as central metal and at least one ligand having a cyclopentadienyl skeleton.
    Type: Application
    Filed: May 1, 2008
    Publication date: September 25, 2008
    Applicant: STICHTING DUTCH POLYMER INSTITUTE
    Inventors: John Richard SEVERN, John Clement Chadwick