Patents by Inventor Abbas Razavi

Abbas Razavi 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).

  • Patent number: 9683056
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: June 20, 2017
    Assignee: Total Research & Technology Feluy
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Publication number: 20160032024
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Application
    Filed: October 13, 2015
    Publication date: February 4, 2016
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Patent number: 9206274
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: December 8, 2015
    Assignee: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Publication number: 20150018504
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Application
    Filed: September 26, 2014
    Publication date: January 15, 2015
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Patent number: 8895466
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: November 25, 2014
    Assignee: Total Research & Technology Feluy
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Patent number: 8637421
    Abstract: The present invention discloses a catalyst system based on a metallocene catalyst component and a new single site catalyst component for the production in a single reactor of improved polyolefins having a bimodal molecular weight distribution.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: January 28, 2014
    Assignee: Total Petrochemicals Research Feluy
    Inventor: Abbas Razavi
  • Publication number: 20130338322
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Application
    Filed: May 24, 2013
    Publication date: December 19, 2013
    Applicant: TOTAL PETROCHEMICAL RESEARCH FELUY
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Publication number: 20130281681
    Abstract: The present invention relates to the use of group 3 post-metallocene complexes based on sterically encumbered bis(naphthoxy)pyridine and bis(naphthoxy)thiophene ligands in the ring-opening polymerisation of polar monomers such as, for examples, lactones, lactides, cyclic carbonates.
    Type: Application
    Filed: March 19, 2013
    Publication date: October 24, 2013
    Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Jean-Francois Carpentier, Evgueni Kirillov, Abbas Razavi
  • Publication number: 20130237405
    Abstract: The present invention discloses a catalyst system based on a metallocene catalyst component and a new single site catalyst component for the production in a single reactor of improved polyolefins having a bimodal molecular weight distribution.
    Type: Application
    Filed: April 24, 2013
    Publication date: September 12, 2013
    Applicant: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventor: Abbas Razavi
  • Patent number: 8519070
    Abstract: The present invention relates to the field of group 4 post-metallocene complexes based on sterically encumbered bis(naphthoxy)pyridine and bis(naphthoxy)thiophene ligands. It also relates to the use of such post-metallocene complexes in the polymerization of ethylene and alpha-olefins.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: August 27, 2013
    Assignees: Total Petrochemicals Research Feluy, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Jean-François Carpentier, Evgueni Kirillov, Abbas Razavi
  • Patent number: 8492493
    Abstract: The present invention discloses post-metallocene complexes based on sterically encumbered bi- and tri-dentate naphthoxy-imine ligands. It also relates to the use of such post-metallocene complexes in the oligomerization of ethylene to selectively prepare vinyl-end capped linear alpha-olefins.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: July 23, 2013
    Assignees: Total Petrochemicals Research Feluy, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Jean-François Carpentier, Evgueni Kirillov, Abbas Razavi
  • Patent number: 8481665
    Abstract: Use of a metallocene compound of general formula Ind2R?MQ2 as a component of a catalyst system in producing polyethylene, wherein each Ind is the same or different and is indenyl or substituted indenyl; R? is a bridge which comprises a C1 to C4 alkylene radical, a dialkyl germanium or silicon or siloxane, alkyl phosphine or amine, which bridge is substituted or unsubstituted, M is a Group IV metal or vanadium and each Q is hydrocarbyl having 1 to 20 carbon atoms or halogen; and the ratio of meso to racemic forms of the metallocene in the catalyst system is at least 1:3. The metallocene may be supported. The ethylene may be polymerized in a reaction medium that is substantially free of any external comonomer, with comonomer being formed in situ. The produced polyethylene may have long chain branching. The produced polyethylene may be atactic.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 9, 2013
    Assignee: Total Research & Technology Feluy
    Inventors: Abbas Razavi, Liliana Peters
  • Patent number: 8455386
    Abstract: The present invention discloses a catalyst system based on a metallocene catalyst component and a new single site catalyst component for the production in a single reactor of improved polyolefins having a bimodal molecular weight distribution.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: June 4, 2013
    Assignee: Total Research & Technology Feluy
    Inventor: Abbas Razavi
  • Patent number: 8445608
    Abstract: The present invention discloses a method for preparing long-chain-branched isotactic polypropylene by first oligomerizing propylene with a suitable oligomerization catalyst system and then copolymerizing propylene and the oligomer obtained in situ with a mono-aryl-substituted methylene bridged catalyst system.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: May 21, 2013
    Assignees: Total Petrochemicals Research Feluy, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Jean-Franøois Carpentier, Evgueni Kirillov, Nicolas Marquet, Abbas Razavi
  • Patent number: 8436133
    Abstract: The present invention relates to the use of group 3 post-metallocene complexes based on sterically encumbered bis(naphthoxy)pyridine and bis(naphthoxy)thiophene ligands in the ring-opening polymerisation of polar monomers such as, for examples, lactones, lactides, cyclic carbonates.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: May 7, 2013
    Assignees: Total Petrochemicals Research Feluy, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Jean-François Carpentier, Evgueni Kirillov, Abbas Razavi
  • Patent number: 8426539
    Abstract: The present invention discloses an active supported catalyst system comprising: a) one or more non-metallocene catalyst component; b) an alkylating agent; c) an activating functionalised and fluorinated support. It also discloses a method for preparing said active support and its use in the polymerisation of polar and non polar monomers.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: April 23, 2013
    Assignees: Total Petrochemicals Research Feluy, Centre National de la Research Scientifique (CNRS)
    Inventors: Floran Prades, Roger Spitz, Christophe Boisson, Sabine Sirol, Abbas Razavi
  • Patent number: 8426613
    Abstract: This invention relates to the synthesis of substituted tetrahydroindenyls and the use of the synthesized complexes in the homo- and co-polymerization of ethylene and alpha-olefins.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: April 23, 2013
    Assignee: Total Petrochemicals Research Feluy
    Inventors: Alexander Z. Voskoboynikov, Vyatcheslav V. Izmer, Dmitry S. Kononovich, Abbas Razavi
  • Patent number: 8426534
    Abstract: This invention relates to the field of impact copolymers and their preparation in a single reactor.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: April 23, 2013
    Assignee: Total Research & Technology Feluy
    Inventor: Abbas Razavi
  • Patent number: 8367787
    Abstract: Use of a metallocene compound of general formula Ind2R?MQ2 as a component of a catalyst system in producing polyethylene, wherein each Ind is the same or different and is indenyl or substituted indenyl; R? is a bridge which comprises a C1 to C4 alkylene radical, a dialkyl germanium or silicon or siloxane, alkyl phosphine or amine, which bridge is substituted or unsubstituted, M is a Group IV metal or vanadium and each Q is hydrocarbyl having 1 to 20 carbon atoms or halogen; and the ratio of meso to racemic forms of the metallocene in the catalyst system is at least 1:3. The metallocene may be supported. The ethylene may be polymerized in a reaction medium that is substantially free of any external comonomer, with comonomer being formed in situ. The produced polyethylene may have long chain branching. The produced polyethylene may be atactic.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: February 5, 2013
    Assignee: Total Petrochemicals Research Feluy
    Inventors: Abbas Razavi, Liliane Peters
  • Publication number: 20120316298
    Abstract: The present invention discloses a catalyst system that comprises several bridged bis- or bis-tetrahydro-indenyl components having different substitution patterns in order to prepare polymers having a broad molecular weight distribution.
    Type: Application
    Filed: May 21, 2012
    Publication date: December 13, 2012
    Applicant: TOTAL PETROCHEMICALS RESEARCH FELUY
    Inventor: Abbas Razavi