Patents by Inventor Yuri A. Dubitsky

Yuri A. Dubitsky 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).

  • NLO polymers and optical waveguides based thereon
    Publication number: 20030103759
    Abstract: The invention relates to new polymers useful in non linear optical (NLO) applications, particularly as optical waveguide materials.
    Type: Application
    Filed: October 11, 2002
    Publication date: June 5, 2003
    Inventors: Andrea Zappettini, Silvia Maria Pietralunga, Yuri Dubitsky, Antonio Zaopo, Mario Martinelli
  • Bridged metallocene compounds, processes for the preparation thereof and use thereof in catalysts for the polymerization of olefins
    Patent number: 6369254
    Abstract: Metallocene compounds with two indenyl-type ligands linked in the 4 position by means of a divalent bridging group can be suitably used as components of catalysts for the polymerization of olefins. In particular, it is possible to prepare saturated or unsaturated elastomeric copolymers of ethylene characterized by valuable properties, such as low ash content and uniform distribution of the comonomers in the polymer chain.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: April 9, 2002
    Assignee: Basell Technology Company BV
    Inventors: Luigi Resconi, Ilya E. Nifant'ev, Yuri A. Dubitsky, Elisabetta Barbassa, Colin J. Schaverien, Ren' Ernst
  • 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