Patents by Inventor Fabian Siberdt

Fabian Siberdt 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).

  • Metallocenes and process for the preparation of metallocenes
    Patent number: 6175026
    Abstract: A metallocene corresponding to the formula wherein M is a group 4 transition metal, each Y is, independently, selected from the group of halogen, hydrocarbyl and hydrocarbyloxy, R1, R4 are, independently, selected from the group of hydrogen, hydrocarbyl, hydrocarbyloxy, R2, R3, R5, R6, R7, R8 are, independently, selected from the group of hydrogen, hydrocarbyl, hydrocarbyloxy, with the provision that, respectively, R2 and R3, R5 and R6, R7 and R8 can be linked to each other.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: January 16, 2001
    Assignee: Solvay Polyolefins Europe-Belgium
    Inventors: John J. Eisch, Yun Qian, J{umlaut over (u)}rgen Weber, Nicola Zandona, Fabian Siberdt
  • Metallocenes and process for the preparation of metallocenes
    Patent number: 6087515
    Abstract: A metallocene corresponding to the formula ##STR1## wherein M is a group 4 transition metal, each Y is, independently, selected from the group of halogen, hydrocarbyl and hydrocarbyloxy,R.sup.1, R.sup.4 are, independently, selected from the group of hydrogen, hydrocarbyl, hydrocarbyloxy,R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7, R.sup.8 are, independently, selected from the group of hydrogen, hydrocarbyl, hydrocarbyloxy, with the provision that, respectively, R.sup.2 and R.sup.3, R.sup.5 and R.sup.6, R.sup.7 and R.sup.8 can be linked to each other.A process for the preparation of metallocenes comprising the following steps:(a) contacting, in a solvent, a transition metal halide of formula MX.sub.4 with an organometallic compound of formula M'R.sub.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: July 11, 2000
    Assignee: Solvay Polyolefins Europe-Belgium (Societe Anonyme)
    Inventors: John J. Eisch, Yun Qian, Jurgen Weber, Nicola Zandona, Fabian Siberdt