Patents by Inventor Peter H. T. Vollenberg

Peter H. T. Vollenberg 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).

  • Process for preparing a branched polymer from a vinyl aromatic monomer
    Patent number: 5663252
    Abstract: A free radical polymerization process for producing a branched polymer from a vinyl aromatic monomer comprising polymerizing a vinyl aromatic monomer in the presence of a free radical initiator of the formula: ##STR1## wherein R is H, alkyl, or aralkyl, and R' is alkyl or aryl.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: September 2, 1997
    Assignee: The Dow Chemical Company
    Inventors: William C. Pike, Duane B. Priddy, Peter H. T. Vollenberg