Patents by Inventor J{umlaut over (u)}rgen Rohrmann

J{umlaut over (u)}rgen Rohrmann 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).

  • Metallocene and catalyst used for the preparation of chemically homogeneous cycloolefin copolymers
    Patent number: 6169052
    Abstract: Chemically homogeneous cycloolefin copolymers of polycyclic olefins, such as, for example, norbornene or tetracyclododecene, with cycloolefins and/or acyclic olefins are obtained without ring opening and in a high space-time yield if a catalyst system is used which comprises an aluminoxane and a stereorigid metallocene compound of an element from groups IVb to VIb, of the formula the part of the metallocene molecule formed by M1 and the substituents R16-R17 having C1-symmetry or being in the meso-form.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: January 2, 2001
    Assignee: Targor GmbH
    Inventors: Michael-Joachim Brekner, Frank Osan, J{umlaut over (u)}rgen Rohrmann, Martin Antberg