Patents by Inventor Ilya P. Laishevtsev

Ilya P. Laishevtsev 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).

  • Hetero cyclic metallocene compounds and use thereof in catalyst system for producing olefin polymers
    Patent number: 7112638
    Abstract: A metallocene compound of general formula (I): LGZMXp, wherein L is a divalent group, Z is a moiety of formula (II), wherein R3 and R4 are selected from hydrogen and hydrocarbon groups; A and B are selected from S, O or CR5, wherein R5 is selected from hydrogen and hydrocarbon groups, either A or B being different from CR5; G is a moiety of formula (III), wherein R6, R7, R8 and R9 are selected from hydrogen and hydrocarbon groups, M is an atom of a transition metal, X is selected from a halogen atom, a R10, OR10, OSO2CF3, OCOR10, SR10, NR102 or PR102 group, wherein the substituents R10 is hydrogen and a hydrocarbon group; p is an integer from 0 to 3.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: September 26, 2006
    Assignee: Basell Polyolefine GmbH
    Inventors: Ilya E. Nifant'ev, Simona Guidotti, Luigi Resconi, Ilya P. Laishevtsev
  • Process for the preparation of ethylene polymers
    Patent number: 6864333
    Abstract: Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising single carbon bridged metallocenes, which has a particular ligand system containing a heteroatom.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: March 8, 2005
    Assignee: Basel Polyolefine GmbH
    Inventors: Tiziano Dall'Occo, Ofelia Fusco, Ilya E. Nifant'ev, Ilya P. Laishevtsev
  • Hetero cyclic metallocene compounds and use thereof in catalyst system for producing olefin polymers
    Publication number: 20030036612
    Abstract: 1 A metallocene compound of general formula (I): LGZMXp, wherein L is a divalent group, Z is a moiety of formula (II), wherein R3 and R4 are selected from hydrogen and hydrocarbon groups; A and B are selected from S, O or CR5, wherein R5 is selected from hydrogen and hydrocarbon groups, either A or B being different from CR5; G is a moiety of formula (III), wherein R6, R7, R8 and R9 are selected from hydrogen and hydrocarbon groups, M is an atom of a transition metal, X is selected from a halogen atom, a R10, OR10, OSO2CF3, OCOR10, SR10, NR102 or PR102 group, wherein the substituents R10 is hydrogen and a hydrocarbon group; p is an integer from 0 to 3.
    Type: Application
    Filed: August 27, 2001
    Publication date: February 20, 2003
    Inventors: Ilya E. Nifant'ev, Simona Guidotti, Luigi Resconi, Ilya P. Laishevtsev
  • Process for the preparation of ethylene polymers
    Publication number: 20020198339
    Abstract: Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising single carbon bridged metallocenes, which has a particular ligand system containing a heteroatom.
    Type: Application
    Filed: August 27, 2001
    Publication date: December 26, 2002
    Inventors: Tiziano Dall'Occo, Ofelia Fusco, Ilya E. Nifant'ev, Ilya P. Laishevtsev