Patents by Inventor Vera Steinert

Vera Steinert 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).

  • Low chloride polybutadiene
    Patent number: 8481644
    Abstract: Compositions comprising a coupled interpolymer such as polybutadiene which may be suitable for HIPS and ABS have been discovered. The coupled interpolymer composition comprises an interpolymer comprising one or more monomeric units derived from a diene wherein the coupled interpolymer composition is characterized by: (A) a halide content of less than about 30 ppm based on the total weight of the coupled interpolymer; (B) a molecular weight distribution of from about 1.6 to about 2.4; and (C) a vinyl content of from about 5 to about 15 weight percent based on the total weight of the coupled interpolymer.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: July 9, 2013
    Assignee: Styron Europe GmbH
    Inventors: Evemarie Hamann, Vera Steinert, Norbert Jantsch