Patents by Inventor Nadine Leyser

Nadine Leyser 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 complexes with cationic bridges
    Patent number: 5883277
    Abstract: Metallocene complexes having a cationic bridge of the formula ##STR1## where the substituents have the following meanings: M is a metal of transition group III, IV, V or VI of the Periodic Table of the Elements or a metal of the lanthanide group,X is fluorine, chlorine, bromine, iodine, hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl or --OR.sup.5,R.sup.1 to R.sup.12, Y, Z and n having the meanings set out in the specification, said complexes can be prepared via ligand systems of the formula II ##STR2## as intermediates.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: March 16, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: David Fischer, Franz Langhauser, Gunther Schweier, Hans-Herbert Brintzinger, Nadine Leyser