Patents by Inventor Herbert Tyras

Herbert Tyras 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).

  • Polymerization process
    Patent number: 4384082
    Abstract: In a process for the polymerization of unsaturated aromatic hydrocarbons with BF.sub.3 -etherate or BF.sub.3 -phenolate as the polymerization catalyst, the improvement comprising using BF.sub.3 -alcoholates as a co-catalyst.
    Type: Grant
    Filed: November 3, 1981
    Date of Patent: May 17, 1983
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventors: Gunter Bucksch, Herbert Tyras