Patents by Inventor Alexander A. Sitnikov

Alexander A. Sitnikov 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 2-aryl-substituted indenes
    Patent number: 6271411
    Abstract: A process is disclosed for preparing 2-aryl-substituted indenes by reacting an indene with an arene compound substituted with an halogen atom, preferably a iodine atom, or with an organosulphonate group, said reaction being carried out in a basic medium in the presence of a palladium catalyst. The compounds obtainable by this process can be used to prepare metallocene compounds with transition metals such as titanium, zirconium or hafnium, which are useful as catalyst components in the polymerization of olefins.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: August 7, 2001
    Assignee: Montell Technology Company bv
    Inventors: Ilya E. Nifant'ev, Yuri A. Dubitsky, Alexander A. Sitnikov