Patents by Inventor Donald Hartlen

Donald Hartlen 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).

  • CONTINUOUS TUNING OF Cl:Mg RATIO IN A SOLUTION POLYMERIZATION
    Publication number: 20190127496
    Abstract: The activity of an in situ prepared Ziegler Natta catalyst in a solution polymerization may be tuned on a continuous basis by monitoring the catalyst activity (conversions) and on a frequent periodic basis incrementally adjusting the alkyl halide in the catalyst to optimize the activity.
    Type: Application
    Filed: September 21, 2018
    Publication date: May 2, 2019
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Stephen Brown, Lawrence VanAsseldonk, Stuart Nield, Donald Hartlen, Roy Mauti